Know Before You Buy
Search 50,000+ known faults across every car make and model
Example: Ford Focus 1.6 TDCi · VW Golf 2.0 TDI · BMW 320d E90
Browse by Make
View all makes →How It Works
1. Search
Enter your car make, model, or a specific fault you're concerned about.
2. Browse
Read detailed fault reports with symptoms, causes, and real-world fix costs.
3. Buy With Confidence
Know exactly what to check before handing over any money.
Car Known Faults (CKF) is the UK's most comprehensive database of real-world car problems, compiled from forums, owner reports, and independent garage data. Whether you're buying a used Ford Focus, a second-hand BMW 3 Series, or a pre-owned Volkswagen Golf, our database covers the known issues you need to watch for. Every fault includes symptoms, root causes, DIY fix guides, and estimated repair costs — giving you the knowledge to negotiate, inspect, or walk away.