Engine Reliability Database
Unbiased reliability reports on the most popular car engines. We track known issues, repair costs, and failure probabilities to help you avoid lemons.
How to use this database
Compare engine codes, spot typical defects, and see which engines in your budget and segment are the most reliable.
Pair the database with an Autoscore report to evaluate a specific listing.
Reliability GuidesNew
In-depth analysis of the most searched-for engines. We dive deep into weak points and maintenance trends.
VW 2.0 TDI: Is It Really That Reliable?
The 2.0 TDI is the workhorse of the VW Group. We analyze common issues, from injectors to DPF, and help you find the most durable versions.
BMW B58: Reliability & Issues Guide
The B58 is praised for its performance, but how does it hold up as it ages? We analyze the reliability of BMW's flagship engine.
VW EA888 Gen 3: 2.0 TSI Reliability Guide
The EA888 Gen 3 fixed many issues of the past, but it still has its own weak points. Here is what to look for in 2026.
BMW N47: Timing Chain & Reliability Guide
The N47 is efficient but carries a reputation for timing chain failures. Learn which years are safe and what to check.
Ford 1.0 EcoBoost: Wet Belt & Problems
Ford's 1.0 EcoBoost is brilliant to drive but requires strict maintenance. Learn about the 'wet belt' issues and how to avoid 'EcoBoom'.
Toyota 2.5 Hybrid: Reliability & Longevity
In-depth reliability guide for the Toyota 2.5 Hybrid (A25A-FXS). Discover common issues, maintenance tips, and long-term durability for RAV4 and Camry models.
Mercedes OM651: Reliability & Problems
Detailed analysis of the Mercedes OM651 reliability. We analyze its reliability and common issues like the timing chain tensioner and injectors in detail.
Audi 3.0 TDI V6: Reliability & Problems
The 3.0 V6 TDI is the ultimate cruiser, but repair costs can be premium. See the top issues before buying that Q7 or A6.
Peugeot/Citroen 1.2 PureTech: Wet Belt Problems
The 1.2 PureTech is light and punchy, but its wet timing belt has caused major headaches for owners. Learn how to stay safe.
Mazda 2.2 Skyactiv-D: Reliability & Issues
Mazda's 2.2-liter diesel is powerful but has some unique failure points. We cover carbon buildup, oil dilution, and camshaft wear.