IndyRyatt

Hi everyone,

I have a 2007 Audi A8L 4.2, just got the drivers side parking brake motor replaced. After that, the car just started shaking. It feels like something is holding the car back from accelerating. The engine light came up, scanned it and it ran a code for the egr valves and secondary air pump. The shaking only happens sometimes. which is weird... anybody know what is causing the shaking? it starts to shake around 70-80km/h

MP4.2+6.0

Welcome. See the general advice in the sticky post above.

You need to do some legwork first--no such thing as, "oh yeah, that's the standard slam bang A8 shaking thing." Not even enough info here to sort among motor, brakes, wheels and rest of drivetrain in general. Start with standard diagnostics and get down to which system it is, perhaps focusing first on whether most recent work was done correctly if a sudden change.