Automatic jerks and brake vibration in BMW – how to fix it?

BMW driver question

I own a BMW with an automatic transmission. When I start the car in the morning, I feel jerks when shifting gears (there is cold oil in the transmission). Should I be concerned? The second problem is the vibration of the brake pedal during a long drive (about 1000 km) and at speeds of about 80-100 km/h. Is this phenomenon normal or not?

The problem affected the model BMW 330d F30 with automatic transmission, but it may also occur in other models.

BMW 3 F30 | By Jonathan Palombo (MA62 PFK)[CC BY 2.0], via Wikimedia Commons

Response from BM Cars service

The described problem of the transmission jerking when the oil is cold indicates the need to check the oil level and quality. Oil that is too low, or too overworked, can cause jerking when shifting or downshifting.

The symptom of brake pedal vibration after prolonged driving tends to indicate a problem with the braking system, assuming that the vibrations occur when braking. If they are felt only on the brake pedal (without vibration of the steering wheel), it rather indicates deformation of the rear brake discs.

For an accurate diagnosis, it is necessary to perform a visual inspection of the vehicle and full computer diagnostics.

We also refer you to the page on oil changes in automatic transmissions.

Eight-speed automatic transmission in BMW

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• Fading engine in BMW with automatic transmission

Automatic transmission from ZF | By Ritchyblack – Stefan Krause[FAL] via Wikimedia Commons

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BMW 3 F30 | By User:MB-one (Own work)[CC BY-SA 3.0], via Wikimedia Commons