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Engine fires: what owners report, and what NHTSA acted on

Two records of the same thing, collected in completely different ways. Owners file complaints voluntarily. Recalls are defects the manufacturer confirmed and filed federally. Neither one alone proves much. Comparing them is more informative than either.

The recalls where NHTSA said to park outside

NHTSA issues this warning rarely. It means the defect can start a fire with the car switched off — so keeping it away from a house or garage matters. Model-level, covering 2015–2020 cars.

ModelRecalls DefectYears
Chevrolet Bolt5Electrical System › Propulsion System › Traction Battery2019–2020
Jaguar I-pace4Electrical System › Propulsion System › Traction Battery2019–2020
Hyundai Santa Fe3Service Brakes2015–2020
Kia Optima3Service Brakes2015–2015
Kia Sorento3Service Brakes2015–2020
Kia Sportage3Service Brakes2015–2020
Kia Telluride3Trailer Hitches2020–2020
Genesis G802Service Brakes2017–2020
Hyundai Genesis2Service Brakes2015–2016
Hyundai Tucson2Service Brakes2015–2020
INFINITI QX602Service Brakes2017–2019
Kia Cadenza2Service Brakes2015–2019
Nissan Maxima2Service Brakes2016–2018
Nissan Murano2Service Brakes2015–2018
Nissan Pathfinder2Service Brakes2017–2019
BMW X31Electrical System › Starter Assembly › Relay2020–2020
Chrysler Pacifica1Electrical System › Propulsion System › Traction Battery2020–2020
Ford Expedition1Engine2020–2020
Hyundai Accent1Service Brakes2015–2015
Hyundai Elantra1Service Brakes2015–2015
Hyundai Ioniq1Electrical System › Propulsion System › Traction Battery2020–2020
Hyundai Veloster1Service Brakes2015–2015
Jeep Cherokee1Electrical System › Wiring › Rear Compartment/Trunk2015–2016
Jeep Wrangler1Electrical System › Propulsion System › Traction Battery2020–2020
Kia RIO1Service Brakes2015–2017
Kia Stinger1Service Brakes2018–2020
Lincoln MKC1Engine2015–2019
Lincoln Navigator1Engine2020–2020
Subaru Ascent1Electrical System › Wiring › Interior/Under Dash2019–2020

Fire as a share of an engine's complaints

For each engine: of the complaints filed about it, what share mentioned a fire. This is a ratio inside a single engine, so how many were sold cancels out — which is why these can be compared with each other, unlike complaint totals. Ranked by the lower bound of a 95% confidence interval, so small samples can't top the list on a lucky streak.

Toyota RAV4 2AR-FE · 2.5L I49.9%
Kia RIO GAMMA · 1.6L I49.3%
Kia Sportage THETA II · 2.4L I47.2%
Ram 1500 3.0L V66.4%
Kia Soul GDI · 1.6L I47.9%
Hyundai Kona GAMMA · 1.6L I49.4%
Volvo XC90 B4204TS · 2.0L I48.0%
Kia Sorento LAMBDA-II · 3.3L V65.4%
Volvo XC90 B4204T27 · 2.0L I45.6%
Hyundai Accent GAMMA · 1.6L I45.3%
Hyundai Santa Fe THETA II · 2.4L I43.7%
Kia Soul GAMMA · 1.6L I44.4%
Kia Sedona LAMBDA II · 3.3L V64.6%
Hyundai Tucson 2.0L I43.5%
Dodge Challenger 5.7L V85.7%
BMW 3 Series 2.0L I44.2%
Kia Soul GDI · 2.0L I43.3%
Hyundai Santa Fe THETA II · 2.0L I44.0%
Kia Optima T-GDI · 2.0L I44.7%

all vehicles 1.20%

Do the two records agree?

Of the 29 models with a park-outside recall, 24 have an owner fire-complaint share above the 1.20% database average — typically around 2.5× it. Two records built by unrelated processes pointing the same way.

ModelFire share vs averagePark-outside recalls
Kia RIO9.77%8.2×1
Kia Sportage6.87%5.7×3
Kia Stinger6.56%5.5×1
Hyundai Accent5.53%4.6×1
Hyundai Ioniq4.13%3.4×1
Hyundai Genesis4.00%3.3×2
Kia Sorento3.92%3.3×3
Lincoln Navigator3.60%3.0×1
BMW X33.41%2.8×1
Hyundai Santa Fe3.23%2.7×3
Kia Optima2.95%2.5×3
Kia Cadenza2.94%2.5×2
Chevrolet Bolt2.78%2.3×5
Jaguar I-pace2.66%2.2×4
Jeep Wrangler2.42%2.0×1
Nissan Maxima2.27%1.9×2
Lincoln MKC1.99%1.7×1
Hyundai Tucson1.96%1.6×2
Nissan Murano1.75%1.5×2
Ford Expedition1.67%1.4×1
Hyundai Elantra1.52%1.3×1
Chrysler Pacifica1.49%1.2×1
Hyundai Veloster1.23%1.0×1
Kia Telluride1.22%1.0×3
Subaru Ascent0.95%0.8×1
Jeep Cherokee0.93%0.8×1
INFINITI QX600.93%0.8×2
Nissan Pathfinder0.47%0.4×2
Genesis G800.00%0.0×2

The 5 that don't — and why that isn't a contradiction

A recall can be issued before fires show up in the field. Genesis G80 has two park-outside recalls and zero fire complaints in this data. That is not the data disagreeing with itself; that is what it looks like when a defect gets caught early. Low complaint share next to an active recall is as likely to mean the system worked as anything else.

Recall repairs are free at any franchised dealer, whatever the car's age or how many owners it has had.

Check a specific car by VIN at NHTSA →
Method and limits
  • Complaints: NHTSA public complaint database, model years 2015–2020, each decoded to its exact engine through the partial VIN it carries. Recalls: NHTSA recall database for the same vehicles.
  • The denominator is complaints, not cars on the road. A 5% fire share means five of every hundred complaints about that engine mentioned a fire — not that 5% of those cars catch fire. Nobody publishes per-engine fleet numbers, so a true rate cannot be calculated here.
  • Engines with fewer than 80 complaints are excluded. Fire is rare enough that one extra case would move the figure by more than a point.
  • Complaints are self-reported and skew toward alarming events, and toward vehicles under active recall attention — which is precisely why the recall record is shown next to them rather than on its own.
  • Recalls are issued per model and year, not per engine. A model's recall count is not comparable between manufacturers: it rises with sales volume, and a manufacturer that recalls promptly looks worse than one that stalls.