I've just replaced the PAS sensor and magnetic disc on my BBS drive. I used GreenBikeKit, very good prices on Bafang parts and dirt cheap postage (£6). No VAT added to order and nothing to pay this end. Took around 2 weeks to arrive.
Bafang bbs01/bbs02/bbshd motor parts for replacement BBS, ebike batteries, Bafang M620, Bafang M600, Bafang M500, Bafang M510, KT controller with display-GreenBikeKit.com
BBS01 motor controller, BBS02 motor core, BBSHD reduction gear, BBS pawl clutch, BBS nylon gear, bbs rotor, HD stator, bbs pedal assist sensor(PAS), bbs magnet disc ring, bbs second reduction gear, bbs gasket seal for bafang bbs mid drive repair.
www.greenbikekit.com