Back to search

2017 BMW M4

3.0L Twin-Turbo I6•RWD•DCT•gas•turbo
Be the first sponsor for this vehicle

For $99, we generate the full set of step-by-step repair procedures for this exact vehicle. Free for everyone, forever, with your name on every one.

Sponsor — $99
Dead battery / stuck in Park? Emergency neutral procedure for this M4 →
5-Year Cost of Ownership
$17,681 maintenance + known platform issues
~$3,536/yr · 290¢/mile equivalent · $8,118 maintenance + $6,963 expected platform issues
Common Problems & Known Issues

The F82 M4 with the S55 twin-turbo inline-six is a performance monster, but the engine has well-documented rod bearing and crank hub issues that can lead to catastrophic failure. Transmission cooling and driveline components also require attention on hard-driven examples.

S55 Rod Bearing Failure

Occasional · high severity
Typical onset: 60,000-100,000 mi
Symptoms: metallic knocking at idle that worsens with RPM, metal shavings in oil during analysis, sudden loss of oil pressure, catastrophic engine failure if ignored
Fix: Preventive bearing replacement requires engine-out service, 16-20 hours labor. If rod bearings spin and damage crank journals, you're looking at full engine rebuild or short block replacement at 40-60 hours labor. Many owners do preventive replacement at 60k-80k miles.
Estimated cost: $4,500-7,500 preventive; $15,000-25,000 rebuild

Crank Hub / Harmonic Balancer Failure

Occasional · high severity
Typical onset: 40,000-80,000 mi
Symptoms: squealing or chirping from front of engine, rough idle and vibration, accessory belt walking off pulleys, check engine light with multiple misfires, catastrophic timing failure if hub shears
Fix: Crank hub can slip on the crankshaft due to inadequate press-fit from factory. Requires front-end disassembly, crankshaft service, and hub replacement or pinning. 8-12 hours labor. Critical to catch early before timing chain damage.
Estimated cost: $2,500-4,000

Transmission Oil Cooler Line Leaks

Common · medium severity
Typical onset: 50,000-90,000 mi
Symptoms: transmission fluid dripping near bellhousing area, burnt transmission fluid smell, low fluid warnings on iDrive, erratic shifting under load
Fix: Steel lines corrode or rubber hoses crack at the cooler connections. Requires trans drop or partial subframe lowering depending on access. 4-6 hours labor plus fluid and filter service.
Estimated cost: $1,200-2,200

Transmission Mount Deterioration

Common · low severity
Typical onset: 40,000-70,000 mi
Symptoms: clunking on hard shifts or throttle lift, excessive driveline movement felt through chassis, vibration at idle in gear, visible tears or separation in rubber mount
Fix: Rubber transmission mounts fail from heat and stress, especially on track-driven or aggressively launched cars. Replacement requires trans support and subframe access. 3-5 hours labor.
Estimated cost: $800-1,400

High-Pressure Fuel Pump (HPFP) Failure

Occasional · medium severity
Typical onset: 60,000-100,000 mi
Symptoms: long crank or no-start conditions, limp mode under boost, fuel pressure fault codes, rough running and misfires under load
Fix: HPFP on intake side of engine can fail mechanically or electrically. Replacement requires intake manifold removal. 4-6 hours labor. More common on tuned cars running E85 or high ethanol content fuel.
Estimated cost: $1,500-2,500

Carbon Buildup on Intake Valves

Common · low severity
Typical onset: 50,000-80,000 mi
Symptoms: rough idle and misfires at cold start, loss of power and throttle response, increased fuel consumption, check engine light with multiple misfire codes
Fix: Direct injection means no fuel washing over intake valves. Carbon accumulates and chokes airflow. Walnut blasting through intake ports is standard service. 6-8 hours labor for thorough cleaning.
Estimated cost: $800-1,400

Rear Differential Bushing Failure

Occasional · low severity
Typical onset: 50,000-90,000 mi
Symptoms: clunking from rear on acceleration or deceleration, wandering or loose feel under power, visible movement of differential in subframe, tire wear from misalignment
Fix: Rear diff mount bushings tear from hard launches and track use. Replacement requires diff support and subframe work. 4-6 hours labor. Upgraded polyurethane bushings available.
Estimated cost: $1,000-1,800
Owner tips
  • Do oil analysis every 5,000 miles to catch rod bearing wear early —철 and copper trending up means trouble.
  • Inspect crank hub at every oil change after 40k miles — look for belt dust or wobble on the front pulley.
  • Consider preventive rod bearing replacement at 60k-80k if you plan to keep the car long-term or track it.
  • Use quality fuel and keep up with walnut blasting every 50k to maintain performance and avoid misfires.
  • Transmission and diff fluid changes every 30k miles are critical for longevity, especially with performance driving.
Phenomenal driving machine with real grenade-engine risk — budget $5k-10k reserve for S55 preventive work or walk away unless maintenance records prove it's been addressed.
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.
539 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.
Stuck on a repair? Take it to The Diag Desk — ask a master tech about this exact car → real human answer within 24h, never AI
Building an app?
Free API access to all this data — 20 requests/day, no card required.
Get an API key →
Run a shop?
Manage repairs, estimates, and customers with ShopBase — $249/mo, all features included. Built by the same team.
Try ShopBase →