Workshop Journal: Jamie’s F20 M140i

While there’s nothing we love more than a full-on M car coming through the workshop, you can’t ignore BMW’s ‘M-Lite’ cars; the M135i and M140i being our favourites. What’s not to love about a small, rear wheel drive hatchback with a punchy turbo six-pot up front? Sure, they have their weaknesses but that’s exactly where we step in.

Workshop Journal: Jamie's F20 M140i

Jamie bought his M140i with a number of mods already carried out, including a decat downpipe, remap and more. He then added to it with a Wavetrac differential, uprated brakes and suspension, Corbeau bucket seats and various other tweaks. However, before pushing things a step further and beginning the car’s life as a track-ready beast, he thought it best to bring to us for a mechanical appraisal and service so that we know exactly what we’re dealing with before proceeding.

We gave the M140i an oil service, as always using a Genuine BMW Oil Filter and Millers Nanodrive engine oil. Having complained of a poor brake pedal we also gave it a full fluid change to Millers Racing Brake Fluid 300 Plus – problem solved, for good.

Workshop Journal: Jamie's F20 M140i

The next issue to tackle was a check engine light; thankfully easily fixed. The decat downpipe had been poorly fitted, with none of the lambda sensor wiring secured whatsoever – this allows the cables to rub against the steering shaft, thankfully with no damage in this case. With the wiring fixed and secured, the B58 engine left us in a far happier state.

Workshop Journal: Jamie's F20 M140i

We also fitted a set of H&R rear springs for Jamie to match his fronts and tidied up a few other small issues. With the car now mechanically good, we can begin planning the next mods. Watch this space!

Workshop Journal: Jamie's F20 M140i

Check out Jamie’s vinyl wrapping and PPF work on his website – vinylone.co.uk