Used car buying guide: BMW Z3 M

Not everyone likes the way the Z3 M looks, either. Some love it and others loathe it, the coupé attracting the nickname ‘clown shoe’. In fact, the model wasn’t a smash hit initially, although perceptions are changing and used prices are now on the rise.

Why? Well, apart from the fact that it is a skunkworks sports car that’s only getting scarcer, it’s from a time when BMW’s M division was still cementing itself in the performance car scene with the first M3s and M5s. It was creating cars using powerful naturally aspirated engines with personalities and sounds thataren’t quite present in the M cars of today. Drive the analogue Z3 M and the current Z4 M50i back to back and you’ll notice the difference. As such, the Z3 M is seen as increasingly special slice of automobilia.

The rarest and best examples sometimes go for upwards of £60,000. Fortunately, cheaper cars are available, from around £18,000.

But whichever example you pick – whether it’s a cheaper S50 roadster or a more expensive S54 coupé – you’ll be getting a truly outstanding driver’s car. If the standard Z3 was designed as a more sophisticated alternative to the Mazda MX-5, then the Z3 M is an MX-5 on steroids.

What we said then - 28 January 1998

"It will cover distances at a prodigious rate and even the most hardened drivers can’t fail to be impressed by its astonishing brakes, performance and grip. But despite all its technical brilliance and the audacity of BMW in building such an outrageous machine, we can’t see many people falling in love with this car in the way that it’s so easy to do with an Elise or Boxster. This is just a shade disappointing from a car with so much to boast about.”

How to get one in your garage

An expert’s view - Dan Norris, Munich Legends: “My favourite thing is the way it looks, because there’s something about it that was immediately classic [from day one]. It’s a timeless design and just sitting in it is a real event. The Z3 M is a model that should have never been made and it’s something that’ll probably never be made again. It’s a really exciting car and it goes like stink, too. For the money, it’s properly special, and I think it has still to have its day, value-wise. In terms of reliability, there are some issues relating to build quality and trim, but these are very predictable cars in that they’re pretty reliable mechanically.”

Buyer beware

Engine Oil changes are needed every 7000 miles for the S50 and 11,000 miles for the S54. What’s more, if you hear a ticking sound at idle, that could indicate valve clearance issues. A ‘tractor’ sound, especially on the S50, may be the Vanos unit playing up. Oil leaks here maybe the result of failed solenoid O-rings. Disintegrating bearing shells can bean issue on the S54 and the S50 can suffer from a stretched throttle cable (but that’s easy to replace).

Transmission If you notice that the gearlever is sloppy and leans towards fifth, this may be a sign of a weak return spring but be warned: it’s expensive to fix. Difficult first- and second-gear selection may be due to low hydraulic pressure caused by the clutch hose getting hot. Ensure the differential mounts are secure because they can flex and crack the boot floor.

Brakes and suspension Listen for loose suspension top mounts thumping over speed bumps because they fail every 60,000 miles or so. Look for seized disc calipers, because this is a common problem. Check if the suspension has been overhauled or, more likely, uprated with Bilstein shocks. If so, make sure that you’re happy with the results.

Body Any serious corrosion is likely to be accident related. Even so, check the rear wings, sills and where the bonnet meets the bumper. Ensure that the rear screen is secure and the rear wiper works.

Interior Look out for rocking seats, sticky powered windows (if so, grease the mechanism) and a failed main light switch. See if it has had new seals around the doors and header rails. If it hasn’t, check for signs of perishing and a damp interior. The plastic rear window can become translucent with age, though polishing it can generally fix this issue. The convertible hood itself doesn’t usually need replacing.

Also worth knowing The Z3 M’s engines weren’t the only aspects borrowed from the M-car parts bin. For example, the model has the same brakes as the E36-generation M3. Along with a wider track than the standard Z3, its bespoke wheels, quad exhausts and M-specific colours also helped to create the Z3 M’s distinctive look.