What is the Cam Variator Failure (Cold Start Rattle) problem on a 2008 Maserati Quattroporte (M139)?

Common Problems with the
2008–2010 Maserati Quattroporte (M139)

We've identified 1 known issue that can affect the 2008–2010 Maserati Quattroporte (M139). 1 of these are serious faults that could be expensive to repair.

Known Issues

Serious

Moderate

Minor

The 2008–2010 period has an average number of reported issues compared to other Maserati Quattroporte (M139) year periods.

All Known Issues

Cam Variator Failure (Cold Start Rattle)

SeriousEngine

A notorious issue on the 4.2 and early 4.7 V8 engines. The check valves fail, allowing oil to drain from the variators. If left, it can lead to engine timing issues.

Most affected: 4.2 V8 and early 4.7 V8

Estimated cost: £3,000–£5,000Affects: 2003–2010Often appears around: 30k-60k miles

Typical symptoms

•Brief rattling/ticking noise on cold start
•Check engine light with timing-related codes

What to inspect before you buy

✓Cold start the car and listen intently
✓Ask for documentation that the variator modification has been performed

Buying Tips for the 2008 Maserati Quattroporte (M139)

✓Avoid early "DuoSelect" (robotized manual) cars unless you specifically want that experience; they eat clutches
✓Listen for a 2-3 second "rattle" on a cold start; this indicates cam variator failure
✓Check for sticky interior buttons, which can cost thousands to professionally refinish
✓The ZF automatic (2007+) is significantly more reliable and cheaper to run than the DuoSelect

2003–2007 Maserati Quattroporte (M139)2011–2012 Maserati Quattroporte (M139)