F20 BMW M135i symposer

F20 BMW M135i engine sound uncovered

Well this is a bit of a disappointment. After the brilliant BMW 1 Series M Coupe a lot of eyes had turned to the F20 M135i for comfort.

It didn’t disappoint. The small hatchback ran the ‘Ring at a very fast time and then it defeated a track day special Subaru around a circuit.

F20 BMW M135i symposer
F20 BMW M135i symposer

Apart from these great examples, there are lots and lots of reviews that are basically raves. Something did come up now however.

This is the point where some bad or unfortunate news had to appear. Thankfully, it’s just the first kind we’re dealing with.

One of the … addicts from the 1 Series forum, has identified a bit of foul play with the sound generated by the M135i.

Much like the M5’s Active Sound system, the M135i uses a sound symposer device to provide a different, throatier noise to the interior of the car.

Two videos were posted by the happy owner of such a wonderful machine and he discovered the noise he enjoys so much isn’t real.

Once the device is disconnected, the car’s audio system is disabled, which does kind of convince you not to do it anyway.

The other convincing moment is when you hear the noises in the second video. A very muted straight six cylinder engine is what you get with a few turbo noises here and there.

So what’s the verdict? It’s a shame BMW couldn’t pull it off technically, but we’re sure glad they thought about it long enough to make it happen anyway.

The noise is fake, but the car is brilliant so I for one don’t care, do you?


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