BMW Z3 M review: the cheapest way into a naturally aspirated M straight-six
3.6/5MotorsSouq Editorial Team
For anyone who wants a genuine, naturally aspirated BMW M engine and does not need back seats or a boot, the Z3 M is the smart move: the same fundamental S50/S54 straight-six as the contemporary M3, in a lighter, more compact body, for meaningfully less money on today's classic market. Buy on service history and evidence of the differential and subframe mounts being maintained — this is a 25-plus-year-old car and needs a specialist inspection before any figure changes hands.
Pros
- Genuine S50/S54 M3-derived straight-six with a 7,400 rpm redline and real mechanical character
- Compact, relatively light body makes it feel more immediate than the contemporary M3
- Manual gearbox and rear-wheel drive with none of a modern turbo roadster's compromises
- Meaningfully cheaper entry into naturally aspirated BMW M ownership than an equivalent M3
Cons
- Now a 25-plus-year-old car; differential and subframe mounts need specialist checking
- Soft-top condition and operation need careful inspection before purchase
- No factory warranty relevant at this age; independent specialists only
- Two seats and minimal boot rule it out as anything but a second car
BMW M took the humble Z3 roadster and fitted the wide-body kit and running gear from the contemporary M3, most notably the S50 3.2-litre straight-six that revs to 7,400 rpm with a mechanical directness modern turbocharged engines have traded away. Later cars from 2001 switched to the S54 unit shared with the E46 M3, adding a touch more power and refinement.
Why it is worth seeking out
What makes the Z3 M genuinely interesting is the mismatch between the compact, relatively light Z3 body and a straight-six built for a heavier saloon-based coupe. The result is a car that feels alert and immediate in a way the M3 of the same era, weighed down by two extra doors, does not quite match. It is a manual-only, driver-focused proposition with none of the compromises a modern turbocharged roadster carries.
Buying one in Bahrain today
These cars are now well into classic territory, and the usual checks apply: differential and subframe mount condition, soft-top wear and operation, and evidence of regular servicing on the S50/S54 engine's known maintenance items. There is no factory warranty relevant at this age, and Bahrain's independent BMW specialists rather than the main dealer are the realistic route for ongoing care.