BMW Z4 M review: an E46 M3 engine in a roadster, now firmly a classic buy
3.4/5MotorsSouq Editorial Team
The Z4 M is the purest driver's Z4 BMW has ever built: a screaming, naturally aspirated S54 straight-six, a manual-only gearbox, and none of the electronic safety nets that soften every M car built since. That purity comes with real ownership demands at this age — rear subframe reinforcement history and cooling system condition need a specialist check before any purchase. Buy it for the drive, not for daily convenience.
Pros
- Same screaming 3.2-litre S54 straight-six as the contemporary E46 M3
- Manual-only gearbox with no automatic option to dilute the experience
- Shorter, lighter body makes it feel more immediate through a corner than the M3
- Increasingly sought-after by enthusiasts, supporting classic-market values
Cons
- Rod bearing wear is a known S54 concern on high-mileage or poorly maintained examples
- Rear subframe mounting points need a specialist inspection at this age
- No stability net beyond basic-era ABS electronics; unforgiving in the wrong hands
- No local factory support; care runs entirely through independent BMW M specialists
BMW M dropped the E46 M3's 3.2-litre S54 straight-six, unchanged, into the compact first-generation Z4 body and gave it a specific rear subframe, wider track and a six-speed manual gearbox with no automatic option offered. The result revs to 7,900 rpm with a mechanical intensity that no BMW built since has quite matched, turbocharging having since taken over the entire M lineup.
What sets it apart
Compared with the M3 of the same era, the Z4 M is shorter, lighter and more immediate through a corner, at the cost of some of the M3's composure over rough surfaces. It has no traction control off switch subtlety and no stability net beyond basic ABS-era electronics — this is a car that asks the driver to do the work, which is precisely its appeal to enthusiasts today.
What to check before buying in Bahrain
These cars are now well past the point where age-related checks matter more than mileage. Known S54 concerns like rod bearing wear on high-mileage or poorly maintained examples, and the Z4 M's specific rear subframe mounting points, both need a specialist pre-purchase inspection. Parts and expertise run through independent BMW M specialists rather than the mainstream dealer network.