If you are considering buying a used BMW M3, there are several major reliability issues worth knowing about first. Our garage database tracks 2 known faults for this model, 2 of them rated high severity. Every one below is a repair bill a seller has good reason not to mention.
Found a BMW M3 for sale?
Paste the advert and we read it against its known faults, its MOT history and the DVLA record, and tell you what the seller has not. Free, about a minute, no card.
Check a BMW M3 advert (free) →One owner each, in their own words rewritten as a line, and not counted in our risk scoring. A fault joins the list above once a second report or an editorial source backs it.
Sellers rarely admit these faults outright
We track 6 specific phrases sellers use in adverts to soft-pedal these exact issues. Paste any BMW M3 advert and we check it in seconds.
Check an advert now (free) →An overdue cambelt is the most expensive thing a seller can fail to mention on a used M3. These are the figures UK specialists work to.
S65 engines suffer from premature connecting rod bearing wear. Specialists treat this as a mandatory preventative item before 70,000 miles, with failures known within 60,000. Failure to replace leads to total engine destruction.
The primary notorious failure on the S65 is rod bearings, not the timing chain. However, high-mileage examples can experience wear on the timing chain tensioners and guides. If you hear rattling separate from the typical top-end tick, have the tensioners inspected.
Always confirm against the vehicle handbook. Intervals vary by engine, and several manufacturers revised theirs after failures in service.
The BMW M3 has 2 known faults in our database, 2 of them rated high severity. The most serious are engine (premature connecting rod bearing wear leading to spun bearings) and suspension (rear subframe / floor pan cracking and tearing away from the chassis). None of them makes the car a bad buy on its own; the risk is a seller who knows and says nothing.
No BMW M3 year is a write-off, but the E90 / E92 (2007 to 2013) carries the most serious faults: engine. Year matters less than whether the specific car has had the known fixes, so check the history for them.
Ask the seller about the engine and suspension faults on this page and whether they have been fixed, with invoices. On the test drive watch for metallic knocking from the bottom of the engine and creaking or popping noise from the rear over bumps. Read the MOT history for repeat advisories, then paste the advert into the free check, which reads it against its known faults before you travel. Check a BMW M3 advert →
Owners report 21.8 mpg on average across the BMW M3 engines with data, about 80% of the official combined figure. The gap between official and real-world economy varies a lot by engine, so the Real MPG page lists every engine and generation separately, from 148 owner submissions. BMW M3 Real MPG by engine →
Looking at a BMW M3 right now? Check the advert before you go and see it.
If you used to check the Honest John “Good & Bad” section before the site closed in 2026, this page is where that information now lives. We rebuilt the BMW M3 owner-report history from the archived Honest John dataset, added our own research, specialist and owner-club sources and DVSA recall data, and we keep it free. Each fault above is badged with its source. The same data feeds our free advert check, which reads a listing against every known fault for the exact engine and year.
CarAdCheck is not affiliated with Honest John or Volkswagen Financial Services. What happened to Honest John, and where each feature lives now.
Knowing what a BMW M3 goes wrong with is half of it. The rest is reading the advert and checking the car's history before you hand any money over.