Credov's researched list of the 9 faults the BMW M3 is known for (2007–2013), 8 of them serious or costly. Each one says what to look for when you check the car, so you can spot it before you buy. Not every car has these faults: they are the ones worth checking on this model.
What to look for: Smell for petrol around the rear of the car, and look underneath for damp or staining near the tank.
Why it matters: A leaking tank near a hot exhaust is a fire risk; typically NZ$3,000-$6,500 for a new tank.
What to look for: Lie beside the car and look at each rear subframe mount for cracked sealer, rust lines or new welding.
Why it matters: A torn subframe mount lets the rear axle move and can rip the boot floor; repairs commonly run NZ$3,500-$8,000.
What to look for: Cold start then warm idle, listening for a rattle or tick from the front of the head and a lumpy idle.
Why it matters: Worn VANOS costs power and a sheared bolt can drop metal into the timing case; typically NZ$1,500-$4,500.
What to look for: On the test drive try several up and down shifts in each mode, and listen for the pump buzzing long at door-open.
Why it matters: A failing SMG pump can drop the car into neutral while driving; typically NZ$3,000-$7,000, or a manual conversion.
What to look for: With the engine fully warm, listen at idle and at 2,500 to 3,500 rpm for a light knock or tick.
Why it matters: Preventive bearing replacement is typically NZ$4,500-$8,000; a spun bearing on this high-revving V8 usually ends the engine and costs far more.
What to look for: Bonnet up, ignition on and engine off: listen at the top front of the engine for grinding or whirring.
Why it matters: A failed actuator drops the car into limp mode without warning; typically NZ$2,000-$5,500 to replace both.
What to look for: Ask for proof of a pinned or keyed crank hub, and check the scan for cam or crank timing codes.
Why it matters: If the hub slips the valves can hit the pistons, which usually means a rebuilt or replaced engine. A tuned car without a pinned hub carries that risk, so price it in or ask for the upgrade first.
What to look for: Check the sills at each jack pad and inside the rear wheel arch lips for bubbling or flaking rust.
Why it matters: Owners have had cars written off for jack-point and underbody rot; small surface bubbles are a paint job, but rotten jack points need cutting out and welding in repair sections, which is a structural repair, not cosmetic touch-up.
What to look for: Feel the door pulls and grab handles on both front doors for a tacky or peeling coating.
Why it matters: It is cosmetic only, but it is very common by this age and makes the cabin look worn; fixes range from stripping the coating to replacing the handles or a section of the door card.
Got a question about a BMW M3? Ask Credov: a noise, a warning light, a part or how to fix it.
On top of the faults above, every Credov inspection covers the basics: fuel smell, leaks or filler rust, engine oil leaks, power steering fluid leak, drive belt cracks or squeal, rust underneath: chassis and mounts, engine mounts, engine oil level and colour, coolant level, colour and leaks, head gasket failure signs, cold start: rattle, knock or smoke, rough or hunting idle, engine running hot on gauge, gearbox or diff oil leak, swapped gearbox without lvv and more.
Researched by Credov from manufacturer recalls and service bulletins, owner reports and workshop sources. Repair prices are typical ranges, not quotes. See also fault codes and repair costs.