The E60 M5 remains one of the most celebrated performance sedans ever built. Its naturally aspirated S85 V10, derived from the Formula 1 program, revs to 8,250 rpm and delivers 507 hp with a character no turbocharged engine can replicate. The vast majority were sold with the SMG III automated manual gearbox; a 6-speed manual was available only in North America from 2007. Ownership demands a proactive approach and a substantial maintenance budget.· more· less
Factory bearing clearances are too tight for the high-revving V10, causing premature wear · more· less
The S85 V10 uses rod bearings with only 0.025 mm clearance, roughly half the industry standard of 0.060 mm. This leaves insufficient room for proper oil film formation, especially at high RPM. Bearing wear is not a question of if, but when. Most specialists recommend preventive replacement between 80,000 and 120,000 km regardless of symptoms. Early symptoms include a faint knock or rattle on cold start that disappears once oil pressure builds. Ignoring it leads to catastrophic engine failure requiring a rebuild (€10,000-15,000) or replacement. Preventive rod bearing replacement at a specialist costs approximately €2,500-3,500 including upgraded bearings with better clearances. Some engines have failed as early as 20,000 km due to unfavorable tolerance stacking, though most last considerably longer. Always use 10W-60 oil and change it every 8,000 km at most.
VANOS high-pressure oil pump failure
€2,000 - 6,0002 of 7
Internal pump gears wear and can shed metal debris into the oil system · more· less
The S85 has a dedicated high-pressure oil pump for the VANOS system, located inside the oil pan. Over time, the pump's internal gears wear and can disintegrate, sending metal fragments through the engine's oiling system. There is no pressure sensor on the high-pressure circuit, so failure can go undetected until significant damage has occurred. Symptoms include VANOS fault codes, rough idle, or loss of power at certain RPM ranges. Pre-January 2006 cars also had a known issue with the internal VANOS oil supply line splitting. A rebuilt pump costs approximately €1,500-1,800, but total repair cost with labor and inspection of downstream damage typically runs €2,000-4,000. In catastrophic cases where metal debris has damaged other components, costs can reach €6,000 or more. Many specialists now recommend preventive pump replacement alongside rod bearings.
Throttle actuator gear wear
€800 - 2,5003 of 7
Internal plastic gears strip over time, causing limp mode and power loss · more· less
The S85 has 10 individual throttle bodies, each controlled by an electronic actuator with small internal gears. These gears wear down over time and eventually strip, preventing the throttle valve from operating correctly. When this happens, the engine management triggers limp mode with severely reduced power. The S85 has two banks of 5 cylinders, each controlled by one actuator, so typically only one bank is affected at a time. OEM replacement actuators cost approximately €800-1,200 each from BMW. Rebuilt or upgraded actuators with metal gears are available from specialists for approximately €350-500 each and come with better longevity. The issue affects virtually all S85 engines eventually, typically appearing between 100,000 and 180,000 km. Many owners replace both actuators preventively.
SMG hydraulic pump and clutch wear
€1,500 - 4,0004 of 7
SMG pump motor fails and clutch wears faster than a conventional manual · more· less
The SMG III automated manual gearbox relies on a hydraulic pump to actuate the clutch and shift gears. The pump motor is a common failure point, typically between 80,000 and 130,000 km. Symptoms include slow gear engagement, SMG warning messages, or complete inability to select gears. The pump motor itself costs approximately €300-600, but a complete hydraulic unit replacement can reach €2,000-3,000. The SMG clutch also tends to wear faster than a conventional manual clutch, with many owners reporting replacement needed between 80,000 and 120,000 km. Clutch replacement costs approximately €1,500-2,500 including the flywheel inspection. Cars with 6-speed manual gearboxes (rare, North America only) avoid these issues entirely but command a significant price premium.
VANOS solenoid failure
€500 - 1,5005 of 7
Solenoids degrade causing rough idle, power loss, and fault codes · more· less
The S85 uses four VANOS solenoids (two per bank) to control variable valve timing. These solenoids degrade over time, causing rough idle, hesitation during acceleration, reduced power output, and check engine lights. Individual solenoid replacement costs approximately €150-250 per unit, but diagnosis and labor bring total repair cost to €500-800 per bank. In some cases, the issue is not the solenoid itself but the wiring or the VANOS unit's internal seals, which increases repair complexity and cost. Solenoid issues typically appear between 80,000 and 150,000 km and are often the first sign of broader VANOS system degradation.
Cooling system component failure
€600 - 1,5006 of 7
Water pump, thermostat, and hoses degrade and can cause overheating · more· less
Like most BMWs of this era, the E60 M5's cooling system components have a finite lifespan. The electric water pump typically fails between 80,000 and 120,000 km. The thermostat housing can crack, and various coolant hoses become brittle with age. Given the V10's sensitivity to overheating (which can accelerate rod bearing wear and warp cylinder heads), cooling system maintenance is critical. A complete cooling system overhaul including water pump, thermostat, and key hoses costs approximately €800-1,500 depending on parts chosen. Many specialists recommend proactive replacement of the entire cooling system around 100,000 km.
Secondary air pump failure
€400 - 1,0007 of 7
Pump seizes or relay fails, triggering check engine light on cold starts · more· less
The secondary air injection pump operates during cold starts to help the catalytic converters reach operating temperature faster. The pump can seize from moisture ingestion, or the relay can fail. Symptoms include a check engine light shortly after cold start and occasional rough running during warm-up. While not mechanically critical, it causes persistent fault codes and will fail emissions testing. Replacement costs approximately €400-800 for the pump, or the system can be coded out via a software tune, though this is not legal in all jurisdictions. The issue is common on cars over 100,000 km.
The S85 V10 is an engineering marvel that demands respect and financial commitment. Rod bearing replacement is widely considered mandatory preventive maintenance rather than a risk, and should be budgeted for if not already completed. The VANOS high-pressure pump, throttle actuators, and SMG system all add to the ownership cost equation. Well-maintained examples with documented rod bearing and VANOS service can exceed 200,000 km, but neglected cars can suffer catastrophic engine failure at any mileage. A pre-purchase inspection by an S85 specialist is essential.
Complete service history
Full records from BMW dealer or recognized M specialist are essential. Verify oil change intervals (should be every 8,000-10,000 km with 10W-60 oil).
Cold start observation
Start the engine completely cold. Listen carefully for any knocking, rattling, or ticking sounds in the first 30 seconds. Rod bearing wear and VANOS issues both present on cold start.
Extended test drive
Drive for minimum 30 minutes including highway and spirited acceleration. Monitor for power loss, warning lights, or SMG hesitation.
Oil analysis
Request a recent oil analysis or have one done. Elevated copper or lead levels indicate rod bearing wear. Elevated iron levels suggest other internal engine wear.
Specific for this vehicle
Verify rod bearing service history
Ask for documentation of rod bearing replacement. If not completed and the car has over 80,000 km, budget €2,500-3,500 for preventive replacement. This is the single most important check.
Check VANOS operation across RPM range
Rev through the full range during test drive. Hesitation, stumbling, or power loss between 3,000-5,000 rpm indicates VANOS issues. Scan for VANOS fault codes.
Test SMG in all modes
Shift through all gears in both automatic and manual modes. Listen for grinding, clunking, or delayed engagement. Check clutch bite point position (very high bite point indicates worn clutch).
+ 4 more checksShow less
Scan for throttle actuator codes
Even intermittent throttle actuator faults will be stored in the DME. A diagnostic scan is essential. Test full throttle in a safe environment to verify both banks respond equally.
Inspect cooling system thoroughly
Check coolant level and condition. Look for evidence of leaks around the water pump, thermostat housing, and all hose connections. Overheating history is a serious red flag.
Check for oil leaks from valve covers
The S85 is prone to valve cover gasket leaks. Inspect both sides of the engine for oil residue. Also check the oil filter housing gasket area.
Verify catalytic converter condition
Replacement catalytic converters for the V10 cost €3,000-6,000 per bank. Check for emissions fault codes and listen for rattling from the exhaust that could indicate a damaged catalyst substrate.
Recalls and Technical Service Bulletins
VANOS oil supply line rupture (cars built before January 2006)Verify completed
VANOS high-pressure pump incompatible tolerances (cars built July 2006-2010)Verify completed
Battery cable connector fire risk (certain 2005-2007 models)Verify completed
Contact BMW with the VIN to verify all recall campaigns have been completed. The VANOS-related service actions are particularly important for engine longevity. European recall status can only be confirmed through a BMW dealer.
Warranty Status
Factory warranty (2 years)Expired on all E60 M5s
Extended warrantyNot typically available for cars this age
Rust perforation (12 years)Expired on all E60 M5s
All E60 M5s are well outside any factory or extended warranty coverage. Independent warranty providers may offer limited coverage but typically exclude known S85 weak points like rod bearings and VANOS. Self-insuring with a dedicated maintenance fund is the most practical approach.
Sources: Research draws on model-specific owner forums and owner communities, recall information from official authorities, German automotive press, and multiple workshop cost references cross-checked against each other.
This report is for informational purposes only and does not constitute professional advice. Estimates may be inaccurate. Always have a qualified specialist inspect the vehicle before purchase. We accept no liability for decisions made based on this information.
