What Breaks
Which engine to avoid? 28,000+ used car weaknesses say
What Breaks launched on April 7, 2026 with 1 votes, #8,101 of 21,248 launches that month.
What it does
No site tells you which engine to buy and which to avoid – until now. What Breaks is the largest used car weakness database: 28,000+ issues across 850+ models and 4,500+ engines, curated from real forums and service bulletins. Every engine gets a traffic light rating. Browse by make, model, engine – see what breaks, what it costs, and better alternatives. US coverage growing daily. Chrome Extension for Autotrader.com coming soon.
49,306+ weaknesses models engines
Timing chain, turbo failure, factory rust — we know the typical problems of 5,757 engines across 1353 models. Timing chain, turbo failure, factory rust — we know the typical problems of 5,757 engines across 1353from what-breaks.com
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