2010 Fiat Bravo 1.6L Diesel · WM10 GZG

On 1.4 T-Jet (150PS) and early 1.9 MultiJet models fitted with the GM-Fiat joint-venture M32 six-speed manual gearbox, the end-case bearings on the 6th gear and output shafts suffer premature wear due to tight pre-load tolerances and marginal lubrication under sustained load. If neglected, bearing collapse damages the casing and internal gear clusters, requiring a complete transmission rebuild or replacement.

On Bravos equipped with dual-zone automatic climate control, the small plastic drive splines connecting the stepper actuator motors to the internal heater flap levers become brittle and strip. The motor continues to spin while the internal flap remains stuck, leaving the car blowing only icy cold or scalding hot air on one or both sides of the cabin. Remedying the issue is notoriously labour-intensive because replacing the lower heater casing actuators requires extensive dashboard disassembly.

The 1.4 MultiAir petrol engine replaces traditional camshaft intake valve operation with an electro-hydraulic actuator unit governed by engine oil pressure and high-speed solenoids. If incorrect non-specification oil is used or if service intervals exceed 12 months, oil micro-passages clog and internal actuator chambers fail to prime, leading to valve misfires, rough running, and loss of power requiring complete actuator replacement.