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

Reviewed : 08/18/2024

Comment : We were quoted a minimum of $139.00 for a Smog Check plus additional fees for our vehicle, which is older than 1999. The explanation given was that older vehicles require more ???work??? and needed time for their machine to calibrate and that we should come back another day. However, we noticed that the posted RV rate on the wall started at $139 with normal vehicles starting at $89 - basically tried to rip us off on our Honda!This discrepancy in pricing was concerning, especially since we've never paid over $100 for a Smog Check elsewhere. Recommend potential customers to be cautious and verify pricing details before proceeding with this business.We were quoted a minimum of $139.00 for a Smog Check plus additional fees for our vehicle, which is older than 1999. The explanation given was that older vehicles require more ???work??? and needed time for their machine to calibrate and that ???More

Reviewed : 06/15/2024

Comment : Be aware the pump in this gas station. I use my card on the pump. It show please see cashier. Then i went inside pay with another card. And 20 mins later.. the first credit card I used got charged for $175... Stay away from this place