2006 — 2008
3.2L (S54) - M Roadster / M Coupe performance flagship
Petrol
Listen carefully for any metallic clicking or rattling from the engine bay while at a standstill; in cars of this age, it's common to consider that the S54 Vanos unit might eventually benefit from a professional inspection or refresh.
On a quiet stretch of road, gently steer from side to side; check this by feeling for any 'notchy' sensation in the steering column, as the E85/E86 steering rack can sometimes develop play that might need adjustment.
Before starting the engine, check the dash for any persistent yellow 'DSC' or 'Brake' warning lights; these can point to the hydraulic control unit, a component that occasionally requires attention in higher-mileage examples.
Inspect the rear coil springs closely while the car is jacked up; check this by looking for signs of fatigue or snapping, as these springs are known to be a common wear item given our NZ road conditions.
Plan for a suspension overhaul, focusing on control arm bushings which significantly sharpen the handling when replaced.
Consider a major inspection including differential oil change and valve clearance adjustment check.
Focus on the cooling system components like the radiator and water pump, as these are reaching their common service life.
Prioritise regular engine oil changes using the correct 10W-60 synthetic to keep that S54 engine happy.
Keep a close eye on the cooling system; it's a good habit to monitor coolant levels and check for any weeping around hoses.
Ensure the soft-top roof mechanism (on the Roadster) is kept clean and the drains are clear to prevent water ingress.
Check the condition of the brake pads and rotors regularly, as the M performance setup demands quality components for optimal safety.
Maintain the leather interior with quality conditioners to keep the cabin looking as sharp as the exterior styling.
Estimated repair costs if issues arise
While the S54 engine is a masterpiece, as a piece of future budget planning, it's widely regarded in enthusiast circles to consider a rod bearing shell replacement if there is no documented history of this being addressed.
Depending on how the car has been driven, you might eventually need to budget for refreshing the rear subframe bushings to maintain that tight, responsive handling the M model is famous for.
If you notice a slight loss in mid-range power or a noisy idle, it's common to consider a Vanos system refurbishment to ensure the variable valve timing is operating precisely.
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Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer