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Discussion Starter #1
i have a mk4 astra sri turbo and under hard braking it locks the front right wheel. I can feel the abs kick in but it locks the front right wheel and stays locked up for a second even once the pedal is lifted.

so far i have changed:
new front tyres
replaced abs pump
new master cylinder 4 years ago (was doing this before i changed it)
new discs
new pads
new fluid and bled
new wheel bearings.
GAZ suspension fully refurbed/serviced by GAZ

There are no fault code stored. The only thing i havent changed is the caliper. Is there anyone who has had this problem before? im going to replace the caliper next week but want to know if there is anything else i can try or have missed.
 

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It could be an issue related to the ABS wheel speed sensor that's part of the hub. Do you have access to live data?
 

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That does only really leave the calipers then. Its worth doing both fronts together, the repair kits that contain all the seals etc are not expensive and you can normally clean off a little surface rust form the pistons if that is the issue with yours.
 
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