i have a weird problem with my car, only happens at work, when i turn left into a parking space at work, there are lots of potholes if i go through one i get a violent steering vibration that goes on for a number of seconds.....

i replaced the anti roll bar drop links at the last MOT, but nothing else

whats likely to be the culprit?

 

Anyone have an idea?

 

Engine mount, rack bushes, spring, ballpoint? Could be a number of things