Used car buying guide: Ford Fiesta ST 150

The ST’s naturally aspirated 2.0-litre motor engine sounds like a gargantuan powerplant for a car so small and light, but this was no spicier a lump than that which motivated the humble Mondeo, and it’s often criticised for its lack of character and zip – especially in light of contemporary rivals such as the Renaultsport Clio 182 and Suzuki Swift Sport. But it certainly helps the little Fiesta get down the road quickly enough, and it’s pleasingly durable given the right maintenance. It’s also pretty frugal when you want it to be.

It’s the handling that will really sell you on the ST 150, though, should you be unpersuaded at first glance. The standard Mk5 Fiesta was already among the more dynamically competent models in its segment, and the ST only sweetened the deal.

As a bonus, numbers will have to thin before prices surge dramatically, so you’ve got time to grab a bargain.

How to get one in your garage

An owner's view

Liam Murrin: “I bought my ST with its rod bearings on the way out, so I had its bottom end refreshed. Then I installed a factory-replacement K&N filter and a stainless-steel exhaust. I’ve had the odd problem over the years: the seat tilt handles went (a common weak point but easy to change), the plastic radiator cracked and the power steering can boil over. Otherwise, it has only ever needed consumables and touch-ups.”

Buyer beware...

â–  Engine: The engine was punchy enough in its own right but held at 148bhp to keep insurance costs down, so many owners have eked out a few extra horses using aftermarket air filters (go for cones over panels), performance exhausts and uprated cams, valve springs and throttle bodies. Avoid cheap brands and walk away if the seller can’t give you comprehensive information on any modifications. Otherwise, check the timing chain is tight and check for a rough idle – usually a sign the throttle body needs cleaning and resetting.

â–  Gearbox: Don’t be overly worried by the horror stories about the gearbox ‘exploding’ or ‘falling out of the car’, because it’s a dependable unit if you keep its oil fresh and let the car warm up before shifting through the gears. As in any performance car, though, the synchros and bearings don’t get an easy ride, so some crunchiness is to be expected, particularly from second into third.

â–  Electrics: ECU remaps are common and can make for a more aggressive drive – but also cause starting problems or activate limp-home mode. The airbag light coming on is a common complaint that can usually be traced to a loose connection under a front seat.

â–  Suspension, steering: The power steering pump is poorly cooled so is known to ‘cook’ its fluid. Check for heaviness and a whirring sound once the car is warmed up and see that the fluid in the tank is red, not grey or black. Low-profile tyres make the wheels susceptible to bending, so feel for vibration and wandering. Expect the suspension to feel quite firm and take bumps with caution.

â–  Bodywork: The rear arches are prone to rusting, particularly in coastal areas, but it’s the rear brake pipes you should be more concerned about – they’re made of particularly thin steel and exposed to the elements, so get underneath the car with a torch. Most importantly, make absolutely certain the car hasn’t been crashed or, if it has, that the DVLA has approved its return to the road.

Also worth knowing

The Mk5 Fiesta was facelifted at the end of 2005, but changes were limited to new ‘bubble-eye’ headlights, an optional colour-coded dashboard, revised dials and some other subtle interior tweaks, nothing mechanical.

How much to spend

£1000-£1499: Unfinished projects, tatty track-day toys and cars with undiagnosed faults.

£1500-£1999: High-mileage but otherwise sound pre-facelift STs. Watch out for naff add-ons.

£2000-£2499: Cherished cars with low mileages, few owners and decent history.

£2500 and above: Well-specified facelifted cars, topping out at £5k for the cleanest examples.

One we found