2005 — 2010
5.0L V10 (S85) - Iconic high-revving naturally aspirated V10
Petrol
Check the SMG gearbox smoothness: While driving in low-speed traffic, ensure the shifts are crisp rather than jerky or hesitating; a hesitant shift can sometimes indicate the clutch or hydraulic actuator may eventually require professional inspection. | Action: Ensure the gearbox fluid has been replaced recently.
Listen for VANOS chatter: During cold start-up, listen closely to the engine bay; any rattling or ticking noises that disappear once warm could suggest the high-pressure VANOS system might benefit from a maintenance check. | Action: Verify if the VANOS solenoids have been cleaned or replaced.
Monitor the iDrive system functionality: While parked with the engine running, cycle through every menu option; any flickering or freezing could indicate the CCC module may be nearing the end of its life. | Action: Check if the software has been updated to the latest available version.
Inspect the exhaust for blue smoke: When idling after a spirited drive, check behind the car; any faint blue smoke might suggest the valve stem seals or oil control rings could be something to monitor as the engine ages. | Action: Perform a thorough oil consumption test to see how the engine manages its lubrication.
Consider replacing the rod bearings as a preventative measure to ensure engine longevity.
Typically the time to inspect the cooling system, including the water pump and thermostat.
A common interval to evaluate the SMG clutch and hydraulic pump health.
Prioritize high-quality synthetic oil changes every 5,000 to 7,000 kilometres to protect the S85 engine internals.
Regularly inspect the throttle actuator gears, as these are known to be a wear item in these high-revving units.
Keep a close eye on the alternator voltage, as these electronics-heavy beasts are sensitive to even minor power fluctuations.
Ensure the spark plugs and ignition coils are replaced on schedule to maintain that legendary V10 smoothness.
Monitor the engine mounts, as the torque from the V10 can cause them to soften over time, impacting chassis feedback.
Estimated repair costs if issues arise
Because the S85 is a high-performance engine, it's common to consider preventative rod bearing replacement to ensure long-term peace of mind. This is a comprehensive job that involves dropping the oil pan and renewing the bearings.
Depending on the car's history, you might eventually need to budget for a refresh of the SMG pump or a clutch replacement. These components are intricate, so setting aside a fund for specialized labour is a smart move.
If the car enters limp mode or displays 'Increased Emissions', the throttle actuators may need attention. These contain internal gears that can wear, requiring a professional repair or replacement.
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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