159
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Which Alfa Romeo 159 engine is the most reliable? See common problems, reviews and reliability verdicts across generations and engines.
Frequently asked questions
Which Alfa Romeo 159 engine is the most reliable?
2.4 JTDm 20v (diesel, 5-cylinder) — Maint. Sensitive verdict. The characterful 5-cylinder 2.4 JTDm — strong, torquey and fundamentally robust, the enthusiast's 159 diesel. Same timing-belt + water-pump discipline as the 1.9, plus higher torque stresses the DMF/clutch. Excellent with full history.
Which Alfa Romeo 159 engines should you avoid?
Engines with the weakest reliability verdicts: 1.9 JTS (petrol), 2.2 JTS (petrol, GM Z22SE-based).
What are the most common Alfa Romeo 159 problems?
The most commonly reported problems across all Alfa Romeo 159 generations and engines: Timing belt + water pump, Carbon build-up (DI), Timing chain wear, Timing chain failure (clogged 1mm oil nozzle), DMF / clutch (high torque).