Engine repair service near Diamond Bar, CA

Came for oil change even though it was busy my car was finished in a timely manner very pleased bringing my car here for service.

AAA Auto club award winning Auto and light Truck repair shop , Serving the San Gabriel Valley for 36 years ASE technicians- Bosch Service center Star Smog station Brake and Lamp certification Vote Best Repair shop in area for last two years

I got my latest set of new (Michelin Defender) tires today along with alignment on my 2013 Prius. The car noise levels, steering, and ride are much improved. I can't say enough about the personal attention, excellent values and great service at Grand Prix. I highly recommend Grand Prix Tire for your automotive needs. Grand Prix is an honest and competent place of business. Jon D E. Monterey Park, CA 2013 Toyota Prius

Last week I had the alternator replaced on my 1989 Ford LTD Crown Victoria and had this car smog checked. This was the second time I have had work done on this particular car but in the past they serviced a 1990 Lexus LS 400 that I used to own. I commend them for their integrity, the excellent quality of their work, and their reasonable prices. I highly recommend them. Ed C. Cypress, CA

Tim and his team TRULY live up to knowing every nut and bolt of BMW's. Tim is Honest, and his prices are a refreshing relief from the dealership! I came to know about Tim when I happened to speak to a young man about his BMW. He highly recommended PHD Bimmer, and I have not regretted it since!! Its a shop for BMW Care that CARES!! Lena

I've had good luck taking my jeep here for servicing. The mechanics here were able to solve a problem that kept causing the engine light to constantly come on. I'd taken my jeep elsewhere in town and the problem was never resolved until I brought my car here. I would definitely recommend this shop. Staff is courteous, professional, and has kept my 15 year old vehicle running smoothly! I will definitely continue to have all work done on my car here at George's Sierra Shell. Nancy

From the owner: “We have one of the best selections of tires at the lowest prices in Riverside. We also offer complete repair services for your car or truck. From transmission repair to brake service, we do it all.”

BRILLIANT SERVICE! WE LOVE YOU SAM! Monica and Patrick! Monica Reed

I recently took my vehicle to ACA and they kep my car for 3 days, they charged me $430 bucks to do a full service and to fix my squeeking breaks. I got my car back only to find I didn't have any windshield wiper fluid, the breaks are squeeking as bad as they were before bringing it in, and I had gressy hand prints running all along the hood on both sides. I called to complain to a manager and was told they would call me back, but they never did. I called again the next day and they told me to drop it off again for another day which forced me to rent a car for my road trip because my car was still broken. Then when I get home and bring my car in they tell me they need it for another day which leaves me without a vehicle yet another day........ These guys are thieves and I will never bring my car back to them and I recommend you find a different shop to go to if your thinking about using them!!

The people at harbor view Mobil were kind, knowledgable and efficient. My car was acting up while I was out of town and both Chris and Tony assured me that everything was going to be ok and kept me in the loop throughout the whole process. The mechanics here are honest, hard working people and I wouldn't hesitate to return whether it be for a big job or routine maintenance. Hannah H. Irvine CA