Just finished rebuilding my original caliper. I cleaned up the piston, and replaced the main seal and piston dust boot. It's now moving freely as it should. I'll be rebuilding the caliper on the other side soon too so they're in sync - that side also felt stiff when I replaced the discs and pads but wasn't completely seized.
If anyone's interested I can post a guide for this process, including photos and part numbers.
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- 2005 Audi A8 D3 4.2L Petrol
- 2008 Ford Mondeo 2.5T
- 2000 Ford Focus 1.6
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