2.4 JTDm 20v (diesel, 5-cylinder)
2005–2011 · diesel · 2387cc · 200hp
Engine codes: 939A3000
Reliability, common problems and owner reviews for the Alfa Romeo 159 2.4 JTDm 20v (diesel, 5-cylinder). Check this before you buy used.
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.
Known Issues
Belt + water pump must be maintained or risk engine damage.
Fix / Workaround: Replace belt + tensioner + water pump on schedule.
Repair cost: €400–€900
Typically appears after: 100,000 km
High torque stresses the DMF and clutch.
Fix / Workaround: Replace DMF + clutch together.
Repair cost: €800–€1500
Mileage Thresholds
After 100,000 km: Belt/water-pump + DMF attention.
Pre-Purchase Checklist
- ☐Strict belt + water pump history
- ☐Idle DMF rattle check
- ☐Robust and characterful with maintenance
Frequently asked questions
Is the Alfa Romeo 159 2.4 JTDm 20v (diesel, 5-cylinder) reliable?
Maint. Sensitive — 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.
What are the common problems and reviews for the Alfa Romeo 159 2.4 JTDm 20v (diesel, 5-cylinder)?
The most commonly reported problems: Timing belt + water pump, DMF / clutch (high torque).
Is a used Alfa Romeo 159 2.4 JTDm 20v (diesel, 5-cylinder) worth buying?
Fine if serviced correctly — but it punishes neglect hard. History and the right consumables matter.