I own a '89 944 NA with 150K miles on it and when it came time to replace the clutch I knew I could trust Dave and his crew. They previously replaced the water pump and timing belt and had me back on the road in no time. In the 3 years I have been in the Bay Area they have always taken great care of my car. If you value your Porsche then you are in good hands with Modderman Services, I have the receipts to prove it.

Had my 911 (model 997) in for repair (very unhealthy engine noise). Modderman diagnosed it promptly as a worn-out water pump, very much to my relief since I suspected worse. They quickly made the repair. In and out in a day, problem gone. Went on a long trip the next day with no problems. Great job!

I was completely satisfied with the service and friendly reception I received at Modderman . I would recommend this shop for it's friendly, honest and professional approach to it's customers. Harry Waight Los Altos

Outstanding Service They really know cars. I always feel like I am treated with courtesy and respect and can depend that they have integrity in all of their dealings and communication with me.

Dave (owner) and Steve (mechanic) are knowledgeable, helpful and friendly. I definitely recommend them!

Great personal attention and quality of work at this well known among Porsche nuts shop from second generation owner Dave Modderman , who oversees everything and discusses the work and options ..I had to convince him to change certain things that I wanted changing even when he said they looked fine ...many other shops are the opposite and swap out things that don't need it purely for their profit from gullible owners . That's the Modderman difference !

I feel confident that Dave aims to provide excellent quality service. He suggests only what is needed to maintain the reliability and joy of ownership for the classic cars he services.

top notch service with a smile!

Outstanding service. My first using their service and will continue. Would strongly recommend to any Porsche owner.

Dave and team at Modderman were great. I had an unexpected service light and needed my breaks done. They cleared the issue and replaced the brakes and rotors. The delivered the car on time and met every expectation. I would highly recommend Modderman