Great Smog check! Very nice staff!

Cool atmosphere and very fun staff! Make sure you book in advance because there is always a waiting list! It’s definitely worth the wait though

Nice and professional staffs to do quick enough check on my cars.

Took my 1979 Volvo 240 for a smog check and they wanted to charge me over $100 to have it completed. Just the smog check. Nothing else.Ive had this car over 10 years and never paid over $50 for ANY smog (all STAR certified).I feel sorry for anyone who doesnt know better and would have just let them perform the smog. Please shop around before taking your car here for anything other than gas.Would think twice for service here even if I were desperate.

Had car problems on Saturday, May 9 in the evening so AAA towed my car to this shop since it had overnight and is open on Sundays. I call the next day and the cashier says the mechanic is not in, perhaps because it is Mothers Day, which is fine. After checking out their Yelp reviews I told him to let the mechanic know that we are just going to pick up the car first thing Monday morning and didnt want any diagnostics done. Today, Monday, May 11 I went to pick up my car when the shop opened. They wanted to charge me $44.50 for a diagnostics that I didnt agree to, and they wouldnt even have had time to do. I didnt go to the shop myself before today. We drove the car to a nearby honest mechanic who found an engine gasket had blown off and we needed a new engine. For some reason Diamond Bar Mobils diagnostics didnt find that problem. Or did they even run a diagnostics? Make sure you know a mechanics reputation before taking your car in.

Very professional and courteous. I was treated with care and kindness.They were prompt and did an excellent job and gave me a sense of security knowing my car was getting the attention it required.I can always depend on Justin and all the guys there to take care of my vehicle. These guys are all honest friendly hard working guys. Thank you Justin,Paul & guys.

Great service! Honest, friendly and courteous staff. Been getting all my cars smog tested in this STAR Certified smog test center for a good 10 years now. If it doesn’t pass, they’ll let you know if there is a problem with your car and they won’t push you to have it fixed at their facility. Although, they are well equipped to get your car working again. But still, it’s up to you if you want them to. Thank you guys and keep up the great work you do!

Fast and professional smog check.

Used them for and oil change then came back for another oil and transmission and rear end service.. they were able to give me price over phone same day service and were so nice throughout it all. I Will continue to use them and never though a gas station could have such good mechanics!!! Thanks guys!!

I refill my propane here.

My tires were low on air, I came to this place (Napa auto care) and they took care of it at no charge. The technician checked all 4 tires and put air in them. Very helpful and friendly service. Thank you Eric for your help!

Always great service and fast! Came into the shop for my smog check and everything checked out! I moved from the area but will continue to bring my cars to them! Thank you!

They are ok and open 7 days.

They patched a hole in my tire incredibly fast!

I always take my car here for smog check. These people are very nice, friendly and honest. You can count on them.

It was a hot day and i stopped for gas, the guy gave me a bottle of water for Free,, thank you sir

Paul, James and the rest of the mechanics in the garage are the best in the game! I recommend anyone to take their vehicle to get worked on.

They are very experienced and honest about whats wrong with the car. Paul and the rest of the crew are nice and easy to approach

The service to get a smog test was quick. I was out of there in 15 minutes. Love the service!

Nice people, gave me bottle of water on warm day free

Quick Smog Check service

Did a great job on my H2 Smog Test. I was in and out fast.

Fast service

Been taking my cars for service here for many years, Paul is a very good down to earth person to work with when dealing with auto repair issues.

Theres no reason not to like this place.

Great place!

Great service and quality of work. Not my first car they worked on and will certainly not be my last.

Great service and clean store, very profisnal

Just pass by, told the head mechanic what was exactly wrong with my check engine light got it computer scan and he was asking for $109 to get diagnosed.. last time I go there

Quick service and nice staff.

Awesome mechanic. 30 plus year master mechanic

I bring my car here all the time for oil changes. The tech named Jim is very nice and helpful.

Professional and honest. Thanks!

Friendly experts.

Excellent machanics

Came here for a smog check as recommended by AAA. Fast service, no appointment.

Great customer service and problem solvers. Thank you!

Good service

Great local mechanics

Gas prices highest in the area - Other stations are at $4.06. This station is at $4.79 as of today 7.21.2014

Nice service

Nice mechanics

Fast gas

Good gas

Typical gas station

COFFEE BEAN COFFEE INSIDE!!!!!

Good service, good quality, always go to this house