Service done: 2008 BMW E60 528i I checked out Performance Autowerk after reviewing their 5 stars ratings from Yelp's review, and came to Evan for an emergency service on my BMW with coolant leaks. My coolant lost was about a quart of coolant each week without any trace of leakage anywhere on the bottom of the car. Because there are no traces of fluid on the floor, I kept insisting to Evan when I first brought my car in that the leakage was possibly due the valve gasket leak... or perhaps the coolant might get into the engine oil. Within just 10 seconds of arriving at his shop and inspecting my car, Evan was able to determine the root cause of the leak. It actually came from the lower section of the radiator. However, there was no fluid on the ground due the catch tray which captured all the fluid. That's just how amazingly knowledgeable Evan is when it comes to German cars! He saves me a tons of money which I know I will pay if taking my car to the dealership. This place is build upon the following statements: integrity, quality, passion of German engineering, honesty, attention to details and friendly service. Despite all the hard work and his hectic schedules, Evan was able to check my car in as soon as I called and service was done within the same day (replacing the radiator and all hoses...almost all the front end coolant related part are placed brand new within the same day). WOW! Not to mention his pricing is absolutely reasonable. I can only sum up my experience at Performance Autowerk as %110 satisfied. The crew here are very friendly, courteous, and knowledgeable with German cars. He takes pride out of each and every vehicle he services, and it shows through his super clean, well-kept shop. Each and every one of his crews is friendly and respectful. I now no longer have to deal with those "consultants" at the East Bay Dealership who would give me a run around. I normally change oil and service my own brakes and other minor jobs non related to engine for all of my cars. This is not because I can't afford to bring it out for service, but because I hate the sloppiness of the work done at the dealers, and have not trusted any of the shop around here....but after coming to Performance Autowerk , it completely changed my perspective and I now found a place that I can completely have confident that they will pamper my car the way I wanted. Evan is truly a gift and a breath of fresh air to our East Bay German Car enthusiast community. He really deserves all the 5 stars in Yelp!