CT Motorwerks in Walnut Creek is where I take my cars (LR4, BMW, Defender 110). Colin and Thorsten are awesome. Fair prices and good work. Colin owns LR's and is a long time member in the Nor Cal Land Rover Club (disclosure I am also a member [emoji106]). Join the club and he offers a discount on service. The club is also a great local resource for help with the LR's and gets them out on the trails where they belong!
Norcalrovers.org