Reliability Database

Used Car Reliability Database

Know the engine before you buy.

Compare engine-specific reliability ratings across 51 brands. Backed by 1,150,453+ 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 A5 2018-2025 ❌ Avoid

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Proven Reliability

#1 Infiniti Q70 2011-2019 ✅ Recommended
#2 Land Rover Range Rover 2013-2022 ✅ Recommended
#3 Mercedes-Benz G-Class 2000-2018 ✅ Recommended

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5,978 Engines Rated

1,459 Generations Analyzed

1,150,453 NHTSA Complaints

51 Brands

Browse by Brand

39 models · 413 engines

45 models · 714 engines

30 models · 240 engines

24 models · 195 engines

12 models · 170 engines

19 models · 215 engines

25 models · 112 engines

23 models · 181 engines

23 models · 144 engines

19 models · 321 engines

12 models · 115 engines

20 models · 144 engines

31 models · 211 engines

11 models · 79 engines

6 models · 64 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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