A good E60 M5 is one of the most rewarding performance cars you can own. A bad one can be very expensive. The difference is almost always in the history and the inspection, so take your time.
1. Start with the paperwork
- Look for a complete, documented service history with regular oil changes using the correct specification.
- Check what major work has been done and when — especially engine bearings, throttle actuators, the SMG hydraulic system and the clutch.
- Confirm the mileage is consistent across invoices, inspections and the car itself.
2. Engine
The S85 V10 is a high-performance engine and needs attentive care. Ask whether the connecting-rod bearings have been inspected or replaced, as this is a widely discussed preventative item among owners. Listen for unusual noises from cold and when warm, watch for warning messages related to the throttle system or VANOS, and check for oil leaks.
A specialist inspection, including reading stored fault codes, is strongly recommended before purchase.
3. SMG III gearbox
- Check that shifts are consistent in all programs and that the car does not show gearbox warnings.
- Ask about the clutch condition — a specialist can read clutch wear data with diagnostic equipment.
- Ask whether the SMG hydraulic pump has been replaced, and whether it has been serviced.
4. Suspension, brakes and tyres
The M5 is heavy and powerful, so it uses its consumables quickly. Look at the brake discs and pads, check for knocks over bumps from worn bushes or links, and make sure the tyres are a matching set of quality brands. Uneven tyre wear can indicate alignment issues.
5. Electronics and interior
Test every function: the iDrive system, head-up display, POWER and M Drive buttons, damper settings, climate control, windows and locks. Electrical faults are usually fixable but can be time-consuming to trace.
6. Body
Inspect for accident repairs, uneven panel gaps and paint differences. Check under the car for damage from low ground clearance and look for corrosion in the usual places.
Questions to ask the seller
- How long have you owned it and why are you selling?
- When were the rod bearings, throttle actuators and SMG pump last addressed?
- Has the car been used on track?
- Can a specialist inspect it before purchase?
Budget for ownership
Set aside a maintenance budget in addition to the purchase price. Even a well-cared-for car will need regular, sometimes expensive, servicing to stay at its best.
This guide is general information, not professional advice. Always have a car inspected by a qualified specialist before buying.