What Breaks is the largest used car weakness database – covering 28,000+ documented issues across 850+ models and 5,300+ engines. Every engine gets a traffic light rating: recommended, neutral, or avoid. What makes it different: Engine-specific, not just model-level. Most sites tell you "the BMW 3 Series has problems." We tell you which of the 9 engine variants to buy and which to avoid – down to the exact engine code. Real data, no AI hallucinations. Every weakness is curated from owner forums, technical service bulletins, and repair databases. Not generated by an LLM. Actionable at the…