1. Kona Service

0

Walnut Creek, CA

Kona Service

5.0 (16 reviews)
Closed • 8:30 am - 5:30 pm

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Services - Kona Service

Auto brake repair

Auto engine repair

Kona Service Photos

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Recommended Reviews - Kona Service

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Photo of Erich L.
101
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4508

8 months ago

Helpful 19
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8 months ago

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2 months ago

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7 months ago

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2 years ago

Helpful 1
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2 years ago

Business owner information

Photo of Mark A.

Mark A.

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Photo of Jim E.
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2 years ago

Business owner information

Photo of Mark A.

Mark A.

We appreciate your Business Jim, It was a pleasure. Thank You!

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Photo of Tom D.
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2 years ago

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2 years ago

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1 year ago

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Photo of K A.
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2 years ago

Business owner information

Photo of Mark A.

Mark A.

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Photo of Stu S.
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1 year ago

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2 years ago

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1 year ago

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2 years ago

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2 years ago

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Ask the Community - Kona Service

Review Highlights - Kona Service

“It's hard being a woman in need of mechanical work sometimes, as not everyone is as kind and honest as Mark.”

Mentioned in 11 reviews

Read more highlights

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Nayarit Transmission & Auto Repair - She is a Beauty

Nayarit Transmission & Auto Repair

(42 reviews)

Fairfax, East Oakland

Reached out to Marcos after getting my flywheel replaced from a different mechanic and immediately…read morestarted having issues. It's was leaking transmission fluid, had a rattling noise and first gear lag. I was told it was the transmission but I wanted a second opinion. Marcos confirmed it was not my transmission and gave me a diagnostic. He is very detailed and honest when explaining diagnostic and providing a detailed quote. After Marcos fixed my car he showed me the new parts and old parts. He is very quick and responsive. Car drives smoother than ever. No more leak, no more rattling and no more acceleration issues. Thank you Marcos for all your help! Your costumer service is exceptional!

I know it seems that 5 stars is hard to achieve, but this shop reached it quick, fast, and without…read moredoubt. Marcos was a blast to work with; he is truly old school. I had my 2003 Hummer H2 towed in and left there feeling good after the work was done. He walked me through the whole process, you will feel comfort in that; I know I did. I was not expecting him to have my failing parts, but he showed me my parts, educated me on the failings of my transmission, and here is the part that totally surprised me " You can take them with you", no one says or does that anymore. His pricing was reasonable and he added extra services just because he knows it was right; I can promote someone and their business with those criteria and qualities; he has got a customer in me.

Walnut Creek Transmission - Inside the shop

Walnut Creek Transmission

(73 reviews)

I was a bit in-shock today that Jim and Karen retired, and their business has changed ownership to…read morewhat is now called Main Street Automotive. I will always be thankful for both of them, as well as Brian, for all the care and consideration. They will be missed. I was a bit uneasy when I dropped-off my car this morning by not seeing familiar faces anymore, but that quickly melted away. The receptionist was cordial, easy to work with, and was careful with everything. To my surprise, I received a text message about what was going on with the car outside of needing an oil change and the incurred charges. When I authorized it, I got a phone call later on that it would need a new engine air filter, too, and once again, was given a price quote up-front, and said they'll order the part and it will be installed in ASAP. I received both a text message AND a phone call that the car was ready, which was super nice that they covered both bases. When I arrived and was being charged out, I was happy to see that Tim is still working in the shop, and he recognized me. They lucked out that he stayed on-board, as he did amazing work with my previous car. I will say I was fortunate that they took care of my car, as they wanted to reschedule my appointment for another time, but they were kind enough to look at it anyways because I was about to do a road trip to Southern California to visit my mom. I appreciate they were still able to do the work, and I have peace of mind I can travel safely. I am impressed with the level of service and care I received today, and I know Jim would be proud knowing that the new ownership has not tainted his shop's reputation. My family will keep supporting them with maintaining our cars, as the competency beat keeps on with this establishment. Thank you!

They did the requested work. They're no longer really a transmission shop, they're focusing in…read moreEVs, which apparently break a lot.

Diablo Auto Specialists - For over 30 years, Diablo Auto Specialists has provided Walnut Creek, CA, and the surrounding areas with superior auto servic...

Diablo Auto Specialists

(187 reviews)

Jon is so helpful, knowledgeable, warm and kind. My SUV…read morewater pump suddenly went out, and it had some other issues going on unbeknownst to me. I didn't know who to take it to, and I don't know much if at all about cars. I had it towed while out of town directly to Jon, and he had it fixed and ready to go in no time. Jon is the best!!! Thx Jon and Diablo Auto Specialists for getting my vehicle back running smooth again and for being unicorns in the industry; having integrity, being ethical and not cheating people out of their money! God bless all of you!

I'd been going to Diablo Auto Specialists the past couple years and had really good experiences…read morewhen Jon was running things. We had 4 cars we took there and always had confidence in the work. Jon's gone and I'm stunned with the change in service now. They don't offer an online list out of items inspected including pictures showing what they've found, and recommendations for work needing to be done. They don't text you with an estimate. They don't call if you need something replaced; you find out only after you show up. The customer service is gone. But it's worse than that. But what really shocked me up was opening up the hood of my car to add some washer fluid only to notice the air filter housing was still unclipped, which seemed negligent. But opening the housing I discovered the air filter was missing entirely! They serviced my car 5000 miles ago and my car didn't have an air filter put in. I was just planning on taking it in for service but it won't be with them now. I'm livid! I'm done with Diablo Auto Specialists, or Autoworx or whatever name change is going on there. I would never go back and would highly discourage anyone else from going there.

Transmatic Transmission - Honda valve body for a Honda transmission

Transmatic Transmission

(92 reviews)

Fruitvale, East Oakland

Our experience with Gil and Transmatic Transmission started a little less than a year ago…read more We have a longtime owned 1997 4Runner that honestly has sentimental value. Mileage 250k+ ( We had just went through the 4Runner mechanically; water pump, timing belt, full tuneup, oil leaks, and intake / valve cover gaskets. When it came to the transmission. We noticed slipping after long rides and we were looking for options. Of course we went to Yelp as to see reviews because we knew transmission work is completed and can be very pricey... Honestly, shops were asking for more money than our 4Runner was worth. Gil was quick with replies and communication, greatly appreciated. Gils price was competitive and because of his reviews we chose to do business with Transmatic Transmission. Openly, I did not write a review until our 4Runner started making noises about 7-8 months after repair at TT. I reached out to Gil as he even gave us his cell phone number and still communication was on point and appreciated. He said "no worries, bring it back and I'll take a look." We towed it back, Gil received our 4Runner without us needing to be present. Gil then repaired our transmission, stood by his warranty and really took care of us without question. Understanding that in business, when you find someone that does what they say and stands behind their work at a competitive price you need to share your experience with the public. Gil from our family to yours, we appreciate your help! Our 4Runner has been back about a month, running like a champ and we are very happy with our service received from Gil and Transmatic Transmission! Rest assured Gil will do what's right in every situation and that is appreciated. Thank you Gil!

Awful Service. Racist owner messed my car up. Kept promising…read moreto fix the issue and then proceeded to act like he didn't mess up the $2350 job. No thanks go to LT transmissions instead. He's terribleTransmatic need to be transformed

Kona Service - autorepair - Updated October 2026

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