Blog
Engine reliability insights, buying guides, and technical deep dives.
What are you looking for?
BMW Engines to Avoid: Reliability Scores & Known Problems
Which BMW engines have the worst reliability? Data-backed scores and known issues for 16 low-scoring BMW engines.
Read more →
Most Reliable Engines Under 1.6L: Complete Ranking
44 engines under 1.6L scored by reliability. Data-backed ranking with issues and repair costs.
Read more →
Opel Engines to Avoid: Reliability Scores & Known Problems
Which Opel engines have the worst reliability? Data-backed scores and known issues for 5 low-scoring Opel engines.
Read more →
Most Reliable Hyundai/Kia Engines: Complete Ranking with Scores
Which Hyundai/Kia engines are the most reliable? Data-backed ranking of 3 Hyundai/Kia engines scoring 78/100 or higher.
Read more →
Skoda Octavia Engine Guide: The Spreadsheet Winner of the VW Group
Same engines as the Golf and A4, Passat-sized interior, 30% less money. Every Octavia engine rated — and why the Octavia is the rational choice nobody regrets.
Read more →
Ford Engines to Avoid: Reliability Scores & Known Problems
Which Ford engines have the worst reliability? Data-backed scores and known issues for 5 low-scoring Ford engines.
Read more →
Most Reliable Opel Engines: Complete Ranking with Scores
Which Opel engines are the most reliable? Data-backed ranking of 2 Opel engines scoring 78/100 or higher.
Read more →
Most Reliable Ford Engines: Complete Ranking with Scores
Which Ford engines are the most reliable? Data-backed ranking of 5 Ford engines scoring 78/100 or higher.
Read more →
Audi A4 Engine Guide: Is the Badge Worth the Premium? Every B7, B8, and B9 Engine Rated
The A4 shares engines with the Golf and Passat — but costs 30% more to buy and maintain. Which A4 engines justify the premium and which make it a money pit.
Read more →
N52 vs M54: Which Engine is More Reliable?
N52 scores 90/100 vs M54 at 93/100. Full comparison with known issues and repair costs.
Read more →
PSA Engines to Avoid: Reliability Scores & Known Problems
Which PSA engines have the worst reliability? Data-backed scores and known issues for 9 low-scoring PSA engines.
Read more →
Volkswagen Engines to Avoid: Reliability Scores & Known Problems
Which Volkswagen engines have the worst reliability? Data-backed scores and known issues for 9 low-scoring Volkswagen engines.
Read more →
N55 vs B58: Which Engine is More Reliable?
N55 scores 76/100 vs B58 at 93/100. Full comparison with known issues and repair costs.
Read more →
N63 vs M278: Which Engine is More Reliable?
N63 scores 42/100 vs M278 at 62/100. Full comparison with known issues and repair costs.
Read more →
VW Passat Engine Guide: The Motorway Car Where Engine Choice Defines Total Cost
The Passat eats kilometres. But a B6 with the wrong engine costs more to maintain than a B8 with the right one. Every Passat engine scored from B5+ to B8.
Read more →
Most Reliable Porsche Engines: Complete Ranking with Scores
Which Porsche engines are the most reliable? Data-backed ranking of 4 Porsche engines scoring 78/100 or higher.
Read more →
Most Reliable Toyota Engines: Complete Ranking with Scores
Which Toyota engines are the most reliable? Data-backed ranking of 19 Toyota engines scoring 78/100 or higher.
Read more →
Mazda3 Engine Guide: Why Mazda Ignored the Turbo Trend and Won
While VW and BMW chased turbo downsizing, Mazda bet on naturally aspirated Skyactiv engines. The Mazda3 reliability data proves they were right.
Read more →
Turbo vs Naturally Aspirated: Which Engines Last Longer?
We compared reliability scores of 265 engines. Naturally aspirated engines score higher on average — but the best turbos are catching up. Here's the data.
Read more →
B48 vs N20: Which Engine is More Reliable?
B48 scores 82/100 vs N20 at 58/100. Full comparison with known issues and repair costs.
Read more →
Most Reliable Mazda Engines: Complete Ranking with Scores
Which Mazda engines are the most reliable? Data-backed ranking of 7 Mazda engines scoring 78/100 or higher.
Read more →
Most Reliable PSA Engines: Complete Ranking with Scores
Which PSA engines are the most reliable? Data-backed ranking of 2 PSA engines scoring 78/100 or higher.
Read more →
Nissan Engines to Avoid: Reliability Scores & Known Problems
Which Nissan engines have the worst reliability? Data-backed scores and known issues for 4 low-scoring Nissan engines.
Read more →
BMW F30 3 Series: Which Engine and Year to Choose
The BMW F30 came with 8 different engines ranging from 35/100 to 93/100. Here's which engine and year combination gives you the most reliable 3 Series.
Read more →
Most Reliable Engines Under 1.4L: Complete Ranking
19 engines under 1.4L scored by reliability. Data-backed ranking with issues and repair costs.
Read more →
Most Reliable Honda Engines: Complete Ranking with Scores
Which Honda engines are the most reliable? Data-backed ranking of 12 Honda engines scoring 78/100 or higher.
Read more →
Most Reliable BMW Engines: Complete Ranking with Scores
Which BMW engines are the most reliable? Data-backed ranking of 13 BMW engines scoring 78/100 or higher.
Read more →
Most Reliable Suzuki Engines: Complete Ranking with Scores
Which Suzuki engines are the most reliable? Data-backed ranking of 7 Suzuki engines scoring 78/100 or higher.
Read more →
Most Reliable Fiat Engines: Complete Ranking with Scores
Which Fiat engines are the most reliable? Data-backed ranking of 2 Fiat engines scoring 78/100 or higher.
Read more →
Buying a BMW E90? The Engine Code Matters More Than the Mileage
The E90 3 Series is an engine lottery — scores range from 25/100 to 93/100. Here's how to pick the right one and avoid a money pit.
Read more →
Most Reliable Nissan Engines: Complete Ranking with Scores
Which Nissan engines are the most reliable? Data-backed ranking of 6 Nissan engines scoring 78/100 or higher.
Read more →
Most Reliable Renault Engines: Complete Ranking with Scores
Which Renault engines are the most reliable? Data-backed ranking of 5 Renault engines scoring 78/100 or higher.
Read more →
VW Golf Engine Guide: Every Generation from Mk4 to Mk8, Ranked by Reliability
From the legendary 1.9 TDI to the problematic EA111 TSI — every Golf engine scored and ranked. Which Golf generation and engine to buy used.
Read more →
BMW N47 Timing Chain Problems: What Every Buyer Must Know
The BMW N47 2.0 diesel has a fatal flaw — a rear-mounted timing chain that stretches and fails. Here's what to check before buying a 320d or 520d.
Read more →
Audi Engines to Avoid: Reliability Scores & Known Problems
Which Audi engines have the worst reliability? Data-backed scores and known issues for 18 low-scoring Audi engines.
Read more →
Porsche Engines to Avoid: Reliability Scores & Known Problems
Which Porsche engines have the worst reliability? Data-backed scores and known issues for 3 low-scoring Porsche engines.
Read more →
EP6/THP (Prince) vs EA211 1.4 TSI: Which Engine is More Reliable?
EP6/THP (Prince) scores 45/100 vs EA211 1.4 TSI at 78/100. Full comparison with known issues and repair costs.
Read more →
Honda Civic Engine Guide: The Commuter That Moonlights as a Legend
The Civic is two cars in one — sensible daily and performance icon. Every engine from the EJ/EK to the FL5 scored for reliability and real-world ownership.
Read more →
Most Reliable Volkswagen Engines: Complete Ranking with Scores
Which Volkswagen engines are the most reliable? Data-backed ranking of 13 Volkswagen engines scoring 78/100 or higher.
Read more →
N54 vs N55: Which Engine is More Reliable?
N54 scores 32/100 vs N55 at 76/100. Full comparison with known issues and repair costs.
Read more →
Fiat Engines to Avoid: Reliability Scores & Known Problems
Which Fiat engines have the worst reliability? Data-backed scores and known issues for 7 low-scoring Fiat engines.
Read more →
Most Reliable Audi Engines: Complete Ranking with Scores
Which Audi engines are the most reliable? Data-backed ranking of 7 Audi engines scoring 78/100 or higher.
Read more →
Most Reliable Volvo Engines: Complete Ranking with Scores
Which Volvo engines are the most reliable? Data-backed ranking of 4 Volvo engines scoring 78/100 or higher.
Read more →
Renault Engines to Avoid: Reliability Scores & Known Problems
Which Renault engines have the worst reliability? Data-backed scores and known issues for 5 low-scoring Renault engines.
Read more →
Every Toyota Corolla Engine Rated: Why It's the Safest Used Car Buy in Europe
No Corolla engine scores below 70/100. Here's why the Corolla is the lowest-risk used car purchase — and which engine-generation combo is best.
Read more →
Hyundai/Kia Engines to Avoid: Reliability Scores & Known Problems
Which Hyundai/Kia engines have the worst reliability? Data-backed scores and known issues for 8 low-scoring Hyundai/Kia engines.
Read more →
OM654 vs B47: Which Engine is More Reliable?
OM654 scores 85/100 vs B47 at 80/100. Full comparison with known issues and repair costs.
Read more →
B47 vs N47: Which Engine is More Reliable?
B47 scores 80/100 vs N47 at 35/100. Full comparison with known issues and repair costs.
Read more →
Mercedes-Benz Engines to Avoid: Reliability Scores & Known Problems
Which Mercedes-Benz engines have the worst reliability? Data-backed scores and known issues for 11 low-scoring Mercedes-Benz engines.
Read more →
Most Reliable Engines Under 2.0L: Complete Ranking
78 engines under 2.0L scored by reliability. Data-backed ranking with issues and repair costs.
Read more →
Most Reliable Mercedes-Benz Engines: Complete Ranking with Scores
Which Mercedes-Benz engines are the most reliable? Data-backed ranking of 10 Mercedes-Benz engines scoring 78/100 or higher.
Read more →