Reliability Database

Used Car Reliability Database

Know the engine before you buy.

Compare engine-specific reliability ratings across 50 brands. Backed by 1,508,163+ NHTSA federal complaints.

Try "Toyota Camry" or "2020 Honda Civic"

Engines to Avoid

#1 Acura CL 2001-2003 ❌ Avoid
#2 Audi A4 2002-2005 ❌ Avoid
#3 Audi Allroad 2003 ❌ Avoid

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Proven Reliability

#1 Mazda Mazda6 2014-2021 ✅ Recommended
#2 Hyundai Sonata 2020-2024 ✅ Recommended
#3 Lexus LX 2008-2021 ✅ Recommended

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6,061 Engines Rated

1,434 Generations Analyzed

1,508,163 NHTSA Complaints

50 Brands

Browse by Brand

39 models · 308 engines

45 models · 1050 engines

30 models · 457 engines

24 models · 357 engines

12 models · 90 engines

19 models · 101 engines

25 models · 186 engines

23 models · 196 engines

19 models · 401 engines

23 models · 140 engines

31 models · 140 engines

20 models · 114 engines

6 models · 20 engines

12 models · 44 engines

5 models · 9 engines

How We Rate Engines

Every rating is derived from NHTSA federal complaint data — the same database used by government safety investigators. We decode VINs to identify specific engines, then compare complaint density within each vehicle segment. No subscription required. No manufacturer sponsorship.

Powered by: NHTSA Complaints Database · NHTSA VIN Decoder · TWD Editorial Analysis

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