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2019 BMW M5 F90

4.4L V8 Twin-Turbo S63•AWD•AUTOMATIC•gas•turbo
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5-Year Cost of Ownership
$29,560 maintenance + known platform issues
~$5,912/yr · 490¢/mile equivalent · $9,532 maintenance + $17,428 expected platform issues
Common Problems & Known Issues

The F90 M5's S63 twin-turbo V8 is a powerhouse, but early examples suffer from catastrophic rod bearing failures and related bottom-end carnage, often with little warning. When they fail, it's engine-out and a full rebuild or replacement—think $25k-40k. These aren't high-mileage wear items; failures happen between 30k-70k miles.

Rod Bearing Failure (S63TU4 Engine)

Occasional · high severity
Typical onset: 30,000-70,000 mi
Symptoms: Metallic knocking or ticking from lower engine block, especially cold start, Metal shavings in oil during analysis, Sudden catastrophic failure with loss of oil pressure, Check engine light with low oil pressure codes
Fix: Engine-out required. Full teardown reveals spun bearings, scored crank journals, damaged rods, and sometimes cracked block. Typical fix is either complete short block replacement or full rebuild with upgraded bearings, new pistons, crank machining or replacement. 40-60 hours labor depending on parts availability and machine shop turnaround.
Estimated cost: $25,000-40,000

Transmission Oil Cooler Leaks

Common · medium severity
Typical onset: 40,000-80,000 mi
Symptoms: Transmission fluid pooling under vehicle, typically passenger side, Low transmission fluid warning on iDrive, Burnt transmission fluid smell, Harsh or delayed shifts if fluid level drops significantly
Fix: Oil cooler lines crack at crimp points or cooler itself develops pinhole leaks. Requires removing undertray, sometimes exhaust components for access. Cooler and lines typically replaced as assembly. 3-5 hours labor, plus fluid flush and refill.
Estimated cost: $1,200-2,200

Transmission Mount Failure

Common · low severity
Typical onset: 50,000-90,000 mi
Symptoms: Clunking on hard acceleration or deceleration, Excessive driveline vibration, especially under load, Visible tearing or separation of rubber mount material, Transmission movement visible during throttle blips in park
Fix: The 8-speed ZF transmission mount tears from aggressive launches and high torque. Requires supporting transmission, removing old mount, installing updated part. Many owners upgrade to aftermarket polyurethane mounts for longevity. 2-3 hours labor.
Estimated cost: $600-1,200

Turbocharger Wastegate Rattle

Occasional · medium severity
Typical onset: 60,000-100,000 mi
Symptoms: Rattling noise from engine bay at idle or light throttle, Rattle disappears under boost, No performance loss initially, Can progress to boost control issues and check engine light
Fix: Wastegate actuator arms develop play or actuator bushings wear. Early stages are noise-only, but can lead to boost control problems. Fix requires turbo removal (one or both), actuator replacement or rebuild. 8-12 hours labor per side if both turbos need service.
Estimated cost: $3,500-6,500

High-Pressure Fuel Pump Failure

Occasional · high severity
Symptoms: Extended cranking before start, especially when hot, Rough idle and misfires under load, Loss of power above 4,000 RPM, Fuel pressure fault codes (low rail pressure), Limp mode activation
Fix: HPFP on intake side of V8 fails, often from contaminated fuel or internal wear. Requires intake manifold removal for access. Replace pump, filter, and inspect injectors. If pump grenaded internally, metal debris may require fuel system flush and injector replacement. 6-10 hours labor depending on collateral damage.
Estimated cost: $2,500-5,000

Carbon Buildup on Intake Valves

Common · low severity
Typical onset: 60,000-100,000 mi
Symptoms: Rough idle and slight misfire at cold start, Gradual loss of low-end power, Increased fuel consumption, Occasional misfire codes on cylinder-specific monitors
Fix: Direct injection means no fuel washing over intake valves. Carbon accumulates, restricting airflow. Walnut blasting through intake ports is the proper fix—requires intake manifold removal. 8-10 hours labor for full service on all eight cylinders.
Estimated cost: $1,500-2,500
Owner tips
  • Send oil samples to Blackstone Labs every 5k miles—it's your early warning system for bearing wear. Elevated aluminum and copper are red flags.
  • Change transmission fluid every 40k miles despite BMW's 'lifetime' claim. ZF8 longevity depends on clean fluid, especially with 600+ lb-ft torque.
  • Avoid extended idle periods and short trips. S63 runs rich when cold, accelerating carbon buildup. Let it warm up under light driving before boosting.
  • If buying used, walk away if no oil analysis history exists or seller can't document short trip vs highway use. Track cars with proper cool-downs fare better than city commuters.
Amazing performance, but the rod bearing lottery and catastrophic repair costs make pre-2020 F90s a gamble—budget $5k-10k reserve or buy extended warranty coverage that explicitly includes internal engine components.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
526 jobs across 17 categories
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.
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