BMW S55 engine report, M3 F80
BMW S55 · M3 (F80)
3.0 LPetrolInline-62014–2020
67/100
Checked by hand
[solid]
Fast and usable every day, with the fuel pump and gearbox to budget for
Worth buying, but only on the right car. A full service history, an inspection of the charge cooler and injectors, and money set aside for fuel-system and gearbox work.
ExcellentGoodSolidRiskyAvoid
- Known issues
- 8
- Critical
- 1
- Sources
- 70
Verdict
The high-pressure fuel pump and the gearbox are the two common failures, and both cost a lot to put right, so they set the budget more than anything else.
Ask whether the pump has been replaced and how the transmission has been serviced. Injectors wear out occasionally, as do the clutch and its dual-mass flywheel. Intercooler leaks, carbon build-up on the intake side and oil seeping from seals are rare. The rod bearings are what frighten people, but on this engine they fail rarely.
Specs
- Displacement
- 3.0 L2,979 cc
- Layout
- Inline-6
- Fuel
- Petrol
- Compression
- 10.2:1
- Production
- 2014–2021
- Chassis
- F80
- Generation
- F80 M3
- Fitted
- 2014–2020
Known issues
8 confirmed · sorted by severity
CriticalRod bearing failure
Connecting rod (big end) bearing wear or spun bearing, usually from oil starvation or extended oil-change intervals -- can destroy the engine if not caught early.
Symptoms
- Knocking Noise
- Warning Light
How often
Rare · Owner-caused. Can destroy the engine if ignored. Not safely drivable.
HighHigh-pressure fuel pump failure
HPFP wear or failure, sometimes shedding metal debris into the fuel system.
Symptoms
- Misfire
- Warning Light
- Hesitation
How often
Common · Age-related wear. Does not normally destroy the engine. Not safely drivable.
Evidence
9 owner reports back this, confidence 50/100.
HighDual-clutch / automatic transmission failure
DSG/DCT mechatronic unit failure, or torque converter/gearbox wear, causing rough shifting or transmission failure.
Symptoms
- Hesitation
- Warning Light
How often
Common · Design weakness. Does not normally destroy the engine. Still drivable.
ModerateDual-mass flywheel / clutch wear
Dual-mass flywheel wear causing rattle/vibration, often coinciding with clutch replacement interval.
Symptoms
- Excessive Vibration
- Knocking Noise
How often
Occasional · Expected maintenance. Does not normally destroy the engine. Still drivable.
LowFuel injector failure
Injector wear, sticking, or seal failure causing misfires, rough running, or fuel leaks.
Symptoms
- Misfire
- Rough Idle
- Fuel Smell
How often
Occasional · Age-related wear. Does not normally destroy the engine. Still drivable.
Evidence
38 owner reports back this, confidence 40/100.
LowIntake valve carbon buildup
Direct-injection engines lack fuel washing the intake valves, leading to carbon buildup, misfires, and reduced power over time.
Symptoms
- Misfire
- Power Loss
- Rough Idle
How often
Rare · Expected maintenance. Does not normally destroy the engine. Still drivable.
LowOil leak from seals or gaskets
Valve cover gasket, rear main seal, or front main seal degradation causing external oil leaks.
Symptoms
- Oil Consumption
How often
Rare · Age-related wear. Does not normally destroy the engine. Still drivable.
LowIntercooler failure or leak
Intercooler core cracking or pipe seal failure, causing boost loss.
Symptoms
- Power Loss
How often
Rare · Age-related wear. Can destroy the engine if ignored. Still drivable.
Check the car you're looking at
Owners rarely say at what mileage this engine's problems start, so they aren't sorted by mileage here. These are the ones to ask the seller about, the ones it's best known for first.
What to ask about
- High-pressure fuel pump failureHad this? Tell us at what mileage
- Dual-clutch / automatic transmission failureHad this? Tell us at what mileage
- Rod bearing failureHad this? Tell us at what mileage
- Dual-mass flywheel / clutch wearHad this? Tell us at what mileage
- Fuel injector failureHad this? Tell us at what mileage
- Intake valve carbon buildupHad this? Tell us at what mileage
- Oil leak from seals or gasketsHad this? Tell us at what mileage
- Intercooler failure or leakHad this? Tell us at what mileage
Buying checklist
BMW S55 (M3 F80) · Buying checklist
Sources
Updated 12 Sept 2026 · scoring v2.7
Behind this report sit 70 owner posts, forum threads and official records. Nothing gets on the list on one person's word. It takes a recall, or owners on separate platforms describing the same fault. The score then sets how often a problem turns up against the damage it does.