Reviewed : 12/05/2025

Comment : Great service!
Great gentleman!
Nick was so understanding and even stayed open longer to help me out. I’ve been a returning customer and I will continue to come back.

Reviewed : 10/11/2025

Comment : I have been here twice and both times were a very pleasant experience. This is officially my go-to now for car repair needs. They are so friendly, helpful, thorough, professional and last but not least, honest. As a female, I had been taken advantage of by so many car repair places. But here it is different. So glad DB has this car shop. It is a gem. 2 thumbs up 💯 I recommend.

Reviewed : 09/16/2025

Comment : Don’t. Just don’t go there. There bunch of other professional shop out there. Just don’t. Believe me. Your life will be much easier if you walk away and stay away from those people. Over-priced, Not professional at all. They will keep you wait and waste alot of your Time and tell you come back tomorrow and still do nothing for you even they not busy.

Reviewed : 09/11/2025

Comment : amazing service!!quality and value of service is so worth it. i do recommend this business !!!

Reviewed : 07/21/2025

Comment : Ask for Justin. Did a great job on my car as well as trustworthy and hardworking.

Reviewed : 04/05/2025

Comment : They waste your time by telling you to come in not knowing if they can actually help you with your particular vehicle. If you ask if they can match a competitors quote [due to time restaurant], they will very rudely tell you to go to the competitor.

Reviewed : 01/18/2025

Comment : Diamond Bar Mobil is now open on Saturdays again for all auto repairs , smog checks , tires, tire repairs 8am to 5pm.

Reviewed : 12/31/2024

Comment :

Reviewed : 10/08/2024

Comment : I take all my cars to this location for smog checks. They are usually pretty good, but today I showed up about 30 minutes before the smog technician was in. I asked the other mechanic if he could put some air in my front tires since I was literally parked in the garage and he made me go over to the self-service air Machine where I had to pay 2.50 to get air in my tires. I guess it's hard times for these places but really gonna think about taking my car somewhere else if they're going to nickel and dime for something like this.

Reviewed : 08/18/2024

Comment : I brought my vehicle in for a service engine light issue, and was charged $125 for diagnostic. They recommended per guideline to replace both water pump and thermostat for $2000. I did not get a conclusive answer when I asked whether those 2 components were visually inspected and were not operational. Then I brought to my dealership and found only faulty thermostat replaced under warranty and water pump was fine. Oh well always get another opinion.I brought my vehicle in for a service engine light issue, and was charged $125 for diagnostic. They recommended per guideline to replace both water pump and thermostat for $2000. I did not get a conclusive answer when I asked whether those ???More