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Buying a used Kia Optima JF (2016–2020) in the UAE

Quick answer

The Kia Optima JF is the 2016–2020 Optima, between the 2011–2015 TF and the K5 that replaced it for 2021. Kia’s UAE website listed it with 2.4 and 2.0 multi-point-injection (MPi) engines and a 2.0 turbo for the GT, all with six-speed automatics; US cars have a 2.4 direct-injection (GDi) engine, a 2.0 or 1.6 turbo, or hybrid drive. On a US 2.4 or 2.0 turbo, ask for the record of Kia’s Knock Sensor Detection System (KSDS) software update: Kia America ties its lifetime cover for connecting-rod bearing damage to it, and a US class settlement that also grants lifetime engine cover leaves out cars bought outside the United States and salvage purchases. On a 2017–2018 Optima Hybrid or Plug-in Hybrid, ask for engine recall 21V-844. Treat a 2016 Optima Hybrid as the older TF, with its own campaigns.

Key facts

Generation
Kia Optima JF
Years
2016–2020
Engines
2.4-litre four-cylinder petrol, multi-point injection (Theta II 2.4 MPi): listed on Kia’s UAE website, 2.0-litre four-cylinder petrol, multi-point injection (Nu 2.0 MPi): listed on Kia’s UAE website, 2.0-litre turbocharged four-cylinder petrol (Theta II 2.0 T-GDi): the GT on Kia’s UAE website; US-market cars, 2.4-litre four-cylinder petrol, direct injection (Theta II 2.4 GDi): US-market cars; also in Kia’s general-market catalogues, 1.6-litre turbocharged four-cylinder petrol (Gamma 1.6 T-GDi): US-market cars; in Kia’s April 2018 general-market catalogue, 2.0-litre petrol hybrid and plug-in hybrid (Nu 2.0 GDi): US-market cars, 2017–2020 model years
Transmission
Six-speed automatic (Gulf-market cars; US-market 2.4 GDi and 2.0 turbo; hybrids), Seven-speed dual-clutch transmission (1.6 turbo)
Drive
Front-wheel drive
VIN locations
VIN punched on the bulkhead at the back of the engine bay on petrol cars (2016, 2017, 2018 and 2019 Optima US manuals; Kia: “front side wall of the engine room”) or into the floor under the passenger seat on hybrids (2017, 2018, 2019 and 2020 Optima Hybrid/Plug-in US manuals); VIN plate on top of the dashboard, read through the windscreen; on the driver’s side, per the manual’s roadside-assistance page; Vehicle certification label on the driver’s-side centre pillar (US-market cars)

Telling a JF apart from the TF before it and the K5 after it

Kia America’s bulletins call the 2011–2015 Optima the TF (QF when built in Georgia) and the 2016–2020 car the JF (JFa when built in Georgia), and name the 2021 replacement K5 (DL3a). Kia’s owner’s-manual site uses JF too (JFE for the hybrids). Kia’s UAE website presented the updated car as the “new Optima” that “has undergone an evolution” (January 2019 capture); no Kia source we found dates the update.

In the complaint records of the US National Highway Traffic Safety Administration (NHTSA), 2016–2020 Optima VINs begin 5XXG or KNAG, then T, U, V or W, then 4L: NHTSA’s decoder reads 5XXGT4L37JG, a 2018 pattern, as a 2.4 with direct injection (GDi). The 2015 TF cars have 4A in that place (5XXGM4A7; KNAGM4AD on the hybrid), and 2021 K5s a digit and 4J (5XXG64J2). The tenth character gives the US model year, from G for 2016 to L for 2020. Gulf VINs may follow other patterns, so start from the registration card.

NHTSA’s records also show 2016 Optima Hybrids with KNAGN4AD or KNAGM4AD VINs, read by the decoder as a 2.4-litre hybrid: the TF, or “TF HEV” in Kia’s campaign PI2104. And in February 2017 Kia’s UAE website still listed the earlier Optima beside the all-new one. Earlier Optimas also fall under anti-lock brake-unit recalls with NHTSA advice to park outside until repaired: 23V-652 (certain 2011–2015 Korean-built and 2012–2013 Georgia-built cars and 2011–2013 hybrids) and 21V-331, which replaced 20V-519 (certain Georgia-built 2013–2015 cars).

What to settle on the phone before a viewing

  • Which engine? Kia’s UAE pages list a 2.4 and a 2.0 with multi-point injection (MPi) and a 2.0 turbo for the GT; US cars have a 2.4 with direct injection (GDi), a 2.0 or 1.6 turbo, or hybrid drive.
  • Was the car ever bought as salvage in the US? Kia’s US engine settlement leaves salvage purchases out.
  • On a US 2.4 GDi or 2.0 turbo, is Kia’s Knock Sensor Detection System (KSDS) update, campaign PI1802 or PI1805, on record?
  • On a hybrid or plug-in hybrid, were recall 21V-844 or campaign PI2108 done, and recall 18V-161 on a 2017–2018 plug-in?
  • Turned key or push button? Kia’s anti-theft upgrade is for US Optimas built without an immobiliser.

Multi-point Gulf engines, direct-injection American engines

Kia’s UAE pages for the Optima JF, captured in February 2017 and, after the update, in January 2019, list a Theta II 2.4 MPi, a Nu 2.0 MPi and, for the GT, a 2.0 turbocharged direct-injection (T-GDi) engine, each with a six-speed automatic. The general-market catalogues hosted there add a 2.4 GDi (October 2015 edition) and a 1.6 T-GDi with a seven-speed dual-clutch transmission (April 2018 edition).

Kia’s US manuals list a 2.4 GDi, a 2.0 T-GDi and a 1.6 T-GDi, the last with the seven-speed dual-clutch gearbox, and a Nu 2.0 GDi for the 2017–2020 Optima Hybrid and Plug-in Hybrid; the petrol manuals name the front wheels as the drive wheels. None of the Kia UAE pages we read lists a hybrid, so ask about any hybrid’s origin with the VIN.

On 31 August 2026 Kia’s UAE website announced Al Tayer Motors as Kia’s exclusive importer-distributor, with Premier Motors running Abu Dhabi and Al Ain, taking over from Juma Al Majid Group and honouring existing warranties. Its warranty page, which carries no date, gives most models 60 months or 150,000 km. No official source we found says whether either company will carry out Kia America’s campaigns or honour its US extensions on an imported Optima, so ask with the VIN before you buy.

Gulf spec vs US spec: what actually differs

US-spec cars in the UAE: what changes

Kia’s US engine promises, and who they leave out

Kia America’s KSDS letters promise lifetime cover for engine long-block repairs caused by connecting-rod bearing damage, for new and used owners, once the update is done: campaign PI1802 for 2015–2018 Optimas with the 2.4 GDi or 2.0 turbo, PI1805 for some Korean-built 2019 cars built from 21 May 2018 to 28 February 2019. A US class settlement in the same dispute covers Optimas of 2011–2019 with those engines bought or leased in the United States, excludes cars bought in US territories or abroad and buyers of cars “previously deemed a total loss (i.e., salvage)”, and admits 2019 cars only if built before KSDS reached production.

Salvage and rebuilt titles: what they mean for a UAE buyer

How to read a US auction listing

Flood-damaged cars in the UAE: how to spot one

Where Optima JF owners report trouble

Counts are from NHTSA, 15 October 2026. NHTSA files 2016–2020 Optimas under OPTIMA, OPTIMA HYBRID, OPTIMA PLUG-IN HYBRID and OPTIMA PHEV: 1,676 complaints once duplicates are removed. Sorting them by the partial VIN owners give, we left out 25 from other cars (24 from the earlier 2016 hybrid, one Forte), keeping 1,651, of which 24 carry no VIN. Each is a US owner’s report, not a confirmed defect.

Connecting-rod wear and Kia’s knock-sensor campaigns

NHTSA lists no recall for an engine defect on petrol JF cars; Kia’s earlier engine recall 17V-224 covered certain 2011–2014 Optimas. Once the KSDS update is in, Kia’s owner letter says, detected bearing wear makes the engine light blink and holds the car in a “Limp Home Mode” at about 1,800–2,000 rpm; driving on may end in severe engine damage and a stall. Recall 18V-907 checks the high-pressure fuel pipe on 2014–2017 Optimas whose engine was replaced under warranty or the KSDS campaign.

US owners report this engine most: 345 complaints about 2.4 GDi or 2.0 turbo cars mention seizure, rod bearings, the bearing code P1326 or a replaced engine, and 253 about the 2.4 describe oil consumption (owner reports).

Kia’s US campaigns name only the direct-injection and turbo engines; the only multi-point Optima KSDS campaign we found, PI2104, is for the TF hybrid. No official source we found says whether Gulf JF cars received KSDS, so ask the distributor, with the VIN, which engine campaigns apply.

Hyundai’s Sonata LF was part of the same US court case, In re: Hyundai and Kia Engine Litigation, and has its own knock-sensor campaign, 953, for its 2.4 and 2.0 turbo.

Hyundai Sonata LF buying guide: the Hyundai side of the same engine story

Recall 21V-844 and campaign PI2108 on the hybrids

Recall 21V-844 covers all 2017–2018 Optima Hybrids built from 27 June 2016 to 21 November 2017 and Plug-in Hybrids built from 25 August 2016 to 27 April 2018: Kia’s report warns that damaged connecting-rod bearings can stall the engine or, at worst, start a fire. Dealers test the engine, replace it if needed and install KSDS; Kia then extends US cover to 15 years or 150,000 miles. Campaign PI2108 brings KSDS and the same cover to 2019–2020 hybrids built from 6 July 2018 to 28 October 2019, and plug-ins to 30 May 2019. Recall 18V-161 removes a battery protection switch that can cut power in electric mode, fitting new battery-management units, on plug-ins built from 25 August 2016 to 11 September 2017.

Kia America’s 15-year warranty extensions

Kia America extended to 15 years or 150,000 miles the cover for the power-steering motor on 2016–2017 Optimas and 2017 hybrids and plug-ins when its warning light comes on (WTY023), and for the fuel-pump filter on 2016–2020 Optimas built in Kia’s US plant, which can cut power or set code P1233 (WTY028). On 2019–2020 Optimas an airbag warning light is covered for 15 years with no mileage limit (WTY036).

Optimas without an immobiliser: Kia’s theft countermeasures

Kia America’s bulletin CS2303 adds anti-theft ignition logic to 2016–2020 Optimas (JF, JFa) “which may not be equipped with an immobilizer”, built from 28 August 2015 to 23 June 2020; its owner letter speaks of cars with a steel key and “turn-to-start” ignition. Campaign CS2312 then offers a zinc-reinforced ignition-cylinder protector, on request until 31 March 2027, to cars without a factory immobiliser that were eligible for the software. Both are Kia America programmes, and the dealer fits window decals when the work is done.

Driveshaft, collision-assist and boot-latch recalls

Recall 16V-705 replaces the right front driveshaft on 2016 2.4-litre cars built from 13 November 2015 to 23 April 2016; a cracked shaft can leave the car without drive, or let it roll if the parking brake is off. Recall 19V-539 updates Forward Collision-Avoidance Assist (FCA) software on 2019 1.6 and 2.0 turbo cars built at Kia’s Georgia plant from 21 May 2018 to 29 May 2019. Recall 23V-594 replaces a boot latch base that can stop the boot opening from inside (2016–2018). Recalls 16V-231 and 17V-007 fixed the driver airbag on 18 cars in all. None of the JF recalls tells owners to stop driving or park outside.

Year-by-year severity for the 2016–2020 Optima

Each recall sits in the complaint category NHTSA files its component under. High means an NHTSA recall in that category lists the model year, and the cell shows that category’s complaints for the year. Medium means no recall in the category, but a named category (not “unknown or other”) holds 20 or more complaints that year. Low means neither. Several recalls cover one engine, the hybrids or a build window only.

Kia Optima JF: NHTSA recalls and complaint counts by model year (records retrieved 15 October 2026)
  • 2016 · High

    Issue
    Driver airbag (16V-231, 17V-007; air bags 23); 2.4 front driveshaft (16V-705; power train 69); fuel pipe after an engine replacement (18V-907; fuel system, gasoline 9); boot latch (23V-594; latches, locks and linkages 3)
    What to check
    16V-705 on an early 2.4; 18V-907 after an engine replacement; 23V-594
  • 2016 · Medium

    Issue
    Engine (413), electrical system (96), fuel and propulsion (51), exterior lighting (46), structure (39), visibility (30), vehicle speed control (29), engine and engine cooling (24), steering (24), service brakes (21)
    What to check
    KSDS record; oil level; lights; steering
  • 2017 · High

    Issue
    Hybrid engine bearings (21V-844; engine 191); plug-in battery switch (18V-161; hybrid propulsion system 4); fuel pipe after an engine replacement (18V-907; fuel system, gasoline 2); boot latch (23V-594; latches, locks and linkages 2)
    What to check
    21V-844 on hybrids, 18V-161 on plug-ins; 18V-907; 23V-594; KSDS
  • 2017 · Medium

    Issue
    Electrical system (39), power train (26), fuel and propulsion (22)
    What to check
    Warning lights; gearbox; stalling
  • 2018 · High

    Issue
    Hybrid engine bearings (21V-844; engine 137); plug-in battery switch (18V-161; hybrid propulsion system 0); boot latch (23V-594; latches, locks and linkages 1)
    What to check
    21V-844 on hybrids, 18V-161 on plug-ins; 23V-594; KSDS
  • 2018 · Medium

    Issue
    Electrical system (37), power train (20)
    What to check
    Warning lights; gearbox
  • 2019 · High

    Issue
    Forward Collision-Avoidance Assist, turbo cars (19V-539; forward collision avoidance 36)
    What to check
    19V-539 on a Georgia-built turbo; PI1805 or PI2108 record
  • 2019 · Medium

    Issue
    Engine (93), electrical system (23)
    What to check
    Oil level; airbag light
  • 2020 · Medium

    Issue
    No recall listed; engine (103), power train (28)
    What to check
    PI2108 on a hybrid; oil level; gearbox

Crash and auction records for an Optima

Inside the UAE, the Ministry of Interior (MOI) and Abu Dhabi Police each list a public accident inquiry by chassis number among their e-services. VINCheckr searches the UAE accident records available to it, from MOI and, during periods when MOI cannot be reached, Abu Dhabi Police; a clean result means none was found in those records.

For a car shipped from the US, VINCheckr searches bid.cars, plc.auction and carsbidshistory.com and links to any listing it finds, with photos where the listing has them. A listing shows the Optima was offered at a US auction at least once, and its title and damage fields show whether it was sold as salvage.

How to check a US car’s history in the UAE

Checking an Optima’s mileage claims

We found no public UAE odometer record, so ask for dated paperwork: Kia dealer service invoices for a Gulf car; for a US car, the auction listing and a National Motor Vehicle Title Information System (NMVTIS) report, sold by the approved providers listed on vehiclehistory.gov for up to about $4, the US Department of Justice says.

Where available, VINCheckr also shows European mileage readings from registers and sales listings; most Gulf and US Optimas never appear there, so a missing reading proves nothing either way.

Before you enter the VIN, note what VINCheckr’s recall section covers: NHTSA’s US recalls listed by make, model and year, not Gulf campaigns, and not whether this car was repaired. NHTSA files hybrid recalls such as 21V-844 separately, under OPTIMA HYBRID and OPTIMA PHEV, so for a US-market hybrid also run NHTSA’s VIN recall search, and on any Optima put the VIN to Kia’s UAE distributor.

Checking a Kia Optima JF?

Enter the VIN to check available accident, auction and recall records, plus European mileage readings where available.

0/17
In the Optima JF US manuals we read, the VIN is on a dashboard plate seen through the windscreen, on the driver’s-side centre-pillar label and punched on the bulkhead at the back of the engine bay (petrol) or in the floor under the passenger seat (hybrid).

Where Kia stamps the Optima JF’s VIN

Kia’s US manuals put the VIN on a dashboard plate, the driver’s-side centre-pillar label, and punched on the bulkhead at the back of the engine bay (petrol) or in the floor under the passenger seat (hybrid). No official source we found shows where a Gulf-market JF carries its VIN: take a missing or mismatched number to the distributor and the emirate’s police or licensing authority.

Where to find the VIN on a Kia Optima JF

Optima JF viewing checklist

  1. Match the registration card to the VIN on the dashboard plate and engine-bay bulkhead (under the passenger seat on a hybrid). On a 2011–2015 Optima, ask whether brake-unit recall 23V-652 or 21V-331 (which replaced 20V-519) applies and was done; until then NHTSA advises parking outside.
  2. For a US car, look up title brands and auction listings; a salvage purchase falls outside Kia’s US engine settlement.
  3. On a US 2.4 GDi or 2.0 turbo, ask for the KSDS record (PI1802 or PI1805), check the oil as the manual describes (level ground, engine warm, then off for about five minutes) and listen for knocking at idle.
  4. If the engine was ever replaced, ask for proof of fuel-pipe recall 18V-907.
  5. On a 2017–2018 hybrid or plug-in, see proof of 21V-844; on a 2019–2020 hybrid, PI2108; on a 2017–2018 plug-in, 18V-161.
  6. On a 2016 car, ask about airbag recalls 16V-231 and 17V-007 and, on a 2.4 built November 2015 to April 2016, driveshaft recall 16V-705.
  7. On a Georgia-built 2019 turbo, confirm the 19V-539 update; on a 2016–2018 car, ask about boot-latch recall 23V-594.
  8. With the engine running, turn the steering lock to lock and watch for the steering warning; check that the airbag light goes out after start-up.
  9. On a US car with a turned key and no immobiliser, ask whether anti-theft software CS2303 or cylinder protector CS2312 was fitted.
  10. Give the VIN to Al Tayer Motors, or Premier Motors in Abu Dhabi and Al Ain, and ask which campaigns are open; have a mechanic read stored codes such as P1326 and P1233.

Frequently asked questions

Do Kia’s knock-sensor campaigns apply to Gulf-specification Optima JF engines?

Not as far as any Kia source shows: Kia’s US campaigns name the 2.0 turbo, which Kia’s UAE pages list for the GT, but not the 2.4 and 2.0 multi-point-injection (MPi) engines also on those pages, and none covers Gulf cars. Ask Kia’s UAE distributor, with the VIN, whether the Knock Sensor Detection System (KSDS) update applies.

Who qualifies for the lifetime engine cover in Kia’s US settlement?

Individual owners of 2011–2018 and some 2019 Optimas with a direct-injection 2.0 or 2.4 bought or leased in the United States, once the Knock Sensor Detection System (KSDS) update is done; cars bought abroad and salvage purchases are excluded. A UAE buyer of an import is outside it, so ask Kia’s UAE distributor, with the VIN, what it will cover.

How can the VIN show that an Optima is a JF rather than a TF or a K5?

Through characters five to seven and the tenth: in US National Highway Traffic Safety Administration (NHTSA) complaint records, JF VINs begin 5XXG or KNAG, then T, U, V or W and 4L, with a tenth character from G (2016) to L (2020); TF cars show 4A and K5s a digit and 4J. Gulf VINs may differ, so match the registration card and ask the distributor.

Is there an engine recall on the Optima Hybrid and Plug-in Hybrid?

Yes, recall 21V-844 for the 2017–2018 Optima Hybrid and Plug-in Hybrid; 2019–2020 hybrids built from July 2018 to October 2019 (plug-ins to May 2019) get campaign PI2108 instead. Both add Knock Sensor Detection System (KSDS) software and, in the US, 15-year or 150,000-mile engine cover. Ask for dealer proof before you buy.

Which Optimas can get Kia’s anti-theft software and ignition-cylinder protector?

US-market 2016–2020 Optimas built without an immobiliser: Kia America offers the software (CS2303) and, on request until 31 March 2027, the protector (CS2312) to US owners. A turned key alone does not prove a car lacks an immobiliser, so ask for the dealer invoice.

VINCheckr data

VINCheckr’s figures below count manufacturer codes; they do not show how many cars were imported from the US.

VINs checked on VINCheckr
170
VIN starts with 1–5 (North American manufacturer code)
81%
US auction history found
at least 24%
UAE accident records found
at least 14%
How these figures are calculated (2026-03-13 to 2026-10-15)
  • Aggregated, anonymised VINCheckr checks. Repeat checks of one VIN count once (latest check); reused reports are excluded.
  • Model figures count only checks whose make, model and model year map to that generation, leaving out VIN prefixes that mark another model or generation; the all-vehicle figures count every check with a decoded make.
  • A VIN starting with 1–5 carries a North American manufacturer code. Such cars are usually, but not always, built in North America (NHTSA interpretation letter NCC-240821-001, 2024), and the code does not show where the car was first sold or registered.
  • Auction share: checks with at least one listing on bid.cars, plc.auction or carsbidshistory.com. Listings on bid.cars and plc.auction were not searched from 15 May to 7 October 2026, so the true share is likely higher.
  • Accident share: checks with at least one UAE police accident record (Ministry of Interior or Abu Dhabi Police); checks where the MOI lookup timed out or did not complete are excluded. A minimum, not an exact rate.
  • Figures are shown only for groups of at least 100 unique VINs.

Sources & method

Official sources

  1. [1] Kia America: Technical Service Bulletin CS2303: anti-theft software logic upgrade and decal installation, 2011–2020 Optima (TF, QF, JF, JFa) (February 2023, as filed with NHTSA) (retrieved 2026-10-15)
  2. [2] Kia UAE (kia-uae.com): All-new Optima specification page, headed “Optima JF” (Internet Archive capture of 14 February 2017) (retrieved 2026-10-15)
  3. [3] Kia UAE (kia-uae.com): All-new Optima features page (Internet Archive capture of 11 February 2017) (retrieved 2026-10-15)
  4. [4] Kia Corporation (ownersmanual.kia.com): 2016 Optima Owner’s Manual (US) (retrieved 2026-10-15)
  5. [5] Kia Corporation (ownersmanual.kia.com): 2017 Optima Hybrid and Plug-in Hybrid Owner’s Manual (US) (retrieved 2026-10-15)
  6. [6] Kia Motors America: Product Improvement Campaign PI1802 (Knock Sensor Detection System), Optima owner letter, second notice (3 June 2019, as filed with NHTSA) (retrieved 2026-10-15)
  7. [7] United States District Court for the Central District of California (Kia engine settlement website): Notice of proposed class settlement, In re: Hyundai and Kia Engine Litigation, Kia vehicles (Internet Archive capture of 11 August 2022) (retrieved 2026-10-15)
  8. [8] Kia Motors America: Part 573 Safety Recall Report 21V-844: engine connecting-rod bearings, 2017–2018 Optima Hybrid and Plug-in Hybrid (retrieved 2026-10-15)
  9. [9] Kia America: Product Improvement Campaign PI2104: Theta 2.4L MPI Knock Sensor Detection System, 2014–2016 Optima Hybrid (TF HEV) (as filed with NHTSA) (retrieved 2026-10-15)
  10. [10] US National Highway Traffic Safety Administration (NHTSA): Complaints by vehicle: Kia Optima, Optima Hybrid, Optima Plug-in Hybrid and Optima PHEV, model years 2016–2020 (complaints API; partial-VIN prefixes) (retrieved 2026-10-15)
  11. [11] US National Highway Traffic Safety Administration (NHTSA): vPIC API: DecodeVINValuesBatch for the partial VINs in 2015–2021 Kia Optima and K5 complaints (11-character patterns, not full VINs) (retrieved 2026-10-15)
  12. [12] Kia America: Technical Service Bulletin CS2312: theft-deterrent ignition cylinder protector, 2010–2022 Kia models incl. Optima (JF, JFa) (December 2025, as filed with NHTSA) (retrieved 2026-10-15)
  13. [13] Kia Corporation (ownersmanual.kia.com): Owner’s manual site: model search for “Optima” in every listed country (only U.S.A. returns Optima and Optima HEV) and Optima model years (2016–2019, project code JF; Optima HEV 2017–2020, JFE) (API responses) (retrieved 2026-10-15)
  14. [14] Kia UAE (kia-uae.com): “New Optima” features page (Internet Archive capture of 1 January 2019) (retrieved 2026-10-15)
  15. [15] US National Highway Traffic Safety Administration (NHTSA): Complaints by vehicle: 2015 Kia Optima and Optima Hybrid, and 2021 Kia K5 (complaints API; partial-VIN prefixes) (retrieved 2026-10-15)
  16. [16] Electronic Code of Federal Regulations (US): 49 CFR Part 565 — Vehicle Identification Number (VIN) Requirements (retrieved 2026-10-13)
  17. [17] Kia UAE (kia-uae.com): Optima (earlier model) features page, listed beside the all-new Optima (Internet Archive capture of 11 February 2017) (retrieved 2026-10-15)
  18. [18] US National Highway Traffic Safety Administration (NHTSA): Recalls by campaign: 20V-519, 21V-331 and 23V-652, hydraulic electronic control unit, incl. 2011–2015 Optima (recalls API) (retrieved 2026-10-15)
  19. [19] Kia Motors America: Product Improvement Campaign PI1805: questions and answers (24 October 2019, as filed with NHTSA) (retrieved 2026-10-15)
  20. [20] Kia America: Product Improvement Campaign PI2108 (Knock Sensor Detection System), 2019–2020 Optima Hybrid and Plug-in Hybrid: questions and answers (10 February 2022, as filed with NHTSA) (retrieved 2026-10-15)
  21. [21] Kia Motors America: Part 573 Safety Recall Report 18V-161: battery voltage protection device, 2017–2018 Optima Plug-in Hybrid (retrieved 2026-10-15)
  22. [22] Kia Motors Corporation (on kia-uae.com): All-new Optima catalogue, Kia Motors Corporation general-market LHD edition “1510-DC-KM/GE-LHD” (as hosted on kia-uae.com; Internet Archive capture of 30 June 2017) (retrieved 2026-10-15)
  23. [23] Kia Motors Corporation (on kia-uae.com): Kia Optima catalogue, Kia Motors Corporation general-market LHD edition “1804-DC-KM/GE-LHD” (as hosted on kia-uae.com; Internet Archive capture of 19 August 2021) (retrieved 2026-10-15)
  24. [24] Kia Corporation (ownersmanual.kia.com): 2019 Optima Owner’s Manual (US) (retrieved 2026-10-15)
  25. [25] Kia UAE (kia-uae.com): Al Tayer Motors x Kia: Al Tayer Motors and Premier Motors lead Kia’s next era in the UAE (dated 31 August 2026 in the page’s metadata; no date shown) (retrieved 2026-10-15)
  26. [26] Kia UAE (kia-uae.com): Warranty (undated page) (retrieved 2026-10-15)
  27. [27] Kia Motors America: Product Improvement Campaign PI1805 (Knock Sensor Detection System), 2019 Optima owner letter (29 October 2019, as filed with NHTSA) (retrieved 2026-10-15)
  28. [28] US National Highway Traffic Safety Administration (NHTSA): Recalls by vehicle and by campaign: Kia Optima, Optima Hybrid, Optima Plug-in Hybrid and Optima PHEV, model years 2016–2020 (recalls API, checked against the FLAT_RCL file) (retrieved 2026-10-15)
  29. [29] Kia Motors America: Part 573 Safety Recall Report 18V-907: high-pressure fuel pipe after engine replacement, incl. 2014–2017 Optima (retrieved 2026-10-15)
  30. [30] US National Highway Traffic Safety Administration (NHTSA): Manufacturer communications received, flat files 2015–2019, 2020–2024 and 2025–2026 (searched for 2016–2020 Kia Optima bulletins) (retrieved 2026-10-15)
  31. [31] United States District Court for the Central District of California (settlement website): Notice of proposed class action settlement, In re: Hyundai and Kia Engine Litigation (Internet Archive capture of 6 December 2022) (retrieved 2026-10-15)
  32. [32] Hyundai Motor America: Technical Service Bulletin 20-01-006H: engine monitoring logic product improvement, Service Campaign 953 (February 2020, as filed with NHTSA) (retrieved 2026-10-15)
  33. [33] Kia America: Warranty extension WTY023: Motor Driven Power Steering unit, 2016–2017 Optima, owner notification (as filed with NHTSA) (retrieved 2026-10-15)
  34. [34] Kia America: Warranty extension WTY028: low-pressure fuel pump, 2016–2020 Optima built in the US, owner notification (as filed with NHTSA) (retrieved 2026-10-15)
  35. [35] Kia America: Technical Service Bulletin FUE061: fuel pump filter inspection/replacement, Warranty Extension Program WTY028, 2016–2020 Optima (JFa) (October 2022, as filed with NHTSA) (retrieved 2026-10-15)
  36. [36] Kia America: Warranty extension WTY036: airbag warning light, 2019–2020 Optima, owner notification (as filed with NHTSA) (retrieved 2026-10-15)
  37. [37] Kia America: Anti-theft software upgrade, Optima owner letter CS2303C (24 February 2023, as filed with NHTSA) (retrieved 2026-10-15)
  38. [38] Kia America: Customer Satisfaction Campaign CS2312: anti-theft ignition cylinder protector, owner notification (as filed with NHTSA, 2026) (retrieved 2026-10-15)
  39. [39] Kia Motors America: Part 573 Safety Recall Report 16V-705: right front driveshaft, 2016 Optima 2.4-litre (retrieved 2026-10-15)
  40. [40] Kia Motors America: Part 573 Safety Recall Report 19V-539: Forward Collision-Avoidance Assist software, 2019 Optima 1.6 and 2.0 turbo (retrieved 2026-10-15)
  41. [41] Kia America: Part 573 Safety Recall Report 23V-594: trunk latch base, incl. 2016–2018 Optima and 2017–2018 Optima Hybrid and Plug-in Hybrid (retrieved 2026-10-15)
  42. [42] Kia Motors America: Part 573 Safety Recall Report 16V-231: driver frontal airbag module, 2016 Optima (17 vehicles) (retrieved 2026-10-15)
  43. [43] Ministry of Interior, UAE (MOI): e-Services: Our Services (Public Services) (retrieved 2026-10-14)
  44. [44] Abu Dhabi Police GHQ: e-Services: Our Services (Public Services) (retrieved 2026-10-14)
  45. [45] US Department of Justice, Bureau of Justice Assistance (NMVTIS): What is NMVTIS? (retrieved 2026-10-13)
  46. [46] US Department of Justice, Bureau of Justice Assistance (NMVTIS): Research Vehicle History: Approved NMVTIS Data Providers (retrieved 2026-10-14)
  47. [47] US Department of Justice, Bureau of Justice Assistance (NMVTIS): Used Car Buying Tips (retrieved 2026-10-14)
  48. [48] US National Highway Traffic Safety Administration (NHTSA): Check for Recalls (retrieved 2026-10-13)
  49. [49] Kia Corporation (ownersmanual.kia.com): 2019 Optima Hybrid and Plug-in Hybrid Owner’s Manual (US) (retrieved 2026-10-15)