Our Services

We handle a wide range of repairs and maintenance, all performed at your location. Here's what we do most often for drivers in Sonoma and nearby areas like Glen Ellen, El Verano, Kenwood, Petaluma, and Santa Rosa.

Engine Diagnostics and Check Engine Light

That check engine light makes most people nervous — and honestly, it should. It's your car telling you something's off. We plug in an OBD-II scanner, pull the fault codes, and actually explain what they mean in plain English. No guesswork, no upselling you on repairs you don't need.

We diagnose the problem first, then give you a straight answer about what it will take to fix it.

Oil Change Service

We do full-synthetic and conventional oil changes at your home or workplace. We use the correct viscosity grade for your vehicle — 5W-30, 5W-20, 0W-20, or whatever your manufacturer specifies — and we replace the oil filter every time.

Honest truth: most people wait too long between oil changes. It's the cheapest maintenance you can do to extend the life of your engine. We make it easier by bringing it to you.

Brake Repair and Replacement

Worn brake pads squeak. Worn rotors grind. Soft pedals are a warning you shouldn't ignore. We inspect and replace brake pads, rotors, and calipers using both OEM-quality and aftermarket parts, depending on your preference and budget.

If you're hearing anything unusual from your brakes, don't wait. Brake jobs that get delayed usually end up costing more.

Battery Replacement and Testing

Dead batteries don't give much warning. We test your battery with a proper load tester — not just a voltage check — and if it's on its way out, we replace it with an AGM or standard lead-acid battery sized for your vehicle. We also check the alternator and charging system while we're at it, since a bad alternator kills new batteries fast.

Alternator and Starter Repair

If your car won't start or your battery keeps dying, the problem is often the alternator or starter. We test both, figure out which one is the culprit, and fix it on-site. This is exactly the kind of repair people think requires a shop — it usually doesn't.

AC and Heating Repair

Sonoma summers get warm. If your AC isn't blowing cold, we can recharge the refrigerant and check for leaks. If your heat isn't working in the colder months, we'll diagnose the issue and get it sorted. Comfort on the road matters, and we don't treat climate control as a low-priority service.

Scheduled Maintenance and Tune-Ups

Staying on top of scheduled maintenance is the single best way to avoid expensive repairs down the road. We handle:

• Spark plug replacement (iridium and platinum)
• Timing belt and serpentine belt inspection and replacement
• Air and cabin filter replacement
• Fuel system service and fuel injector cleaning
• Coolant system flush (HOAT and OAT compatible formulas)
• Transmission fluid flush and filter service

If you're not sure what your car is due for, we'll check your maintenance records or look it up by your vehicle's make, model, and mileage. We won't pad the list.

Tire Rotation and Inspection

Uneven tire wear is more than an aesthetics problem. It affects handling, fuel economy, and how long your tires last. We rotate your tires, check tread depth, inspect sidewalls, and check pressure. Simple service, done where you are.

Pre-Purchase Inspection

Thinking about buying a used car? Get it inspected before you commit. We'll look at what matters: brakes, belts, fluid conditions, undercarriage rust, suspension, and run a diagnostic scan for hidden fault codes. A $100-150 inspection can save you thousands on a bad purchase. We serve buyers all across the Sonoma Valley and into Napa County.

Roadside Assistance and Emergency Repairs

Stuck in Kenwood? Broken down near El Verano or out on Highway 12? If it's something we can fix on the spot, we will. Give us a call and we'll tell you honestly whether we can help or whether you need a tow.

Why Sonoma Drivers Choose On-Site Auto Repair

Most auto shops in and around Sonoma, CA do good work. The problem isn't the quality — it's the hassle. Drop the car off, wait for a call, figure out a ride home, go back and pick it up. That cycle eats your whole day.

We skip all of that.

Here's what you actually get when you book with us:

No tow truck needed. If your car starts (or even if it doesn't and you're local), we come to you. No dragging your car across town.

Flat-rate, upfront pricing. You know what it costs before we touch anything. No surprises when you get the bill.

Same-day appointments available. We know car problems don't schedule themselves. We do our best to get to you fast.

ASE Certified mechanic. Not a weekend hobbyist. A credentialed professional with real diagnostic tools.

California BAR Licensed. We're registered with the Bureau of Automotive Repair, which means we follow the rules and you have legal protections if something goes wrong. Most customers don't know to ask about this, but it matters.

Parts and labor warranty. Every repair is backed by a 12-month / 12,000-mile warranty. We stand behind our work.

We've been serving Sonoma, CA and the surrounding Sonoma County communities for years. Our Google reviews tell the story better than we can.

Ready to Book? Here's How It Works

Call or message us with your vehicle, location, and what's going on with your car.

Get a free estimate before we schedule anything.

Pick a time that works for you — at your home, office, or wherever the car is.

We show up, fix it, and you pay after the job is done.

That's it. No waiting rooms. No borrowed rides. No surprises on the bill.

On-Site Auto Repair — Sonoma, CA Serving Sonoma Valley, Glen Ellen, El Verano, Kenwood, Petaluma, Santa Rosa, and surrounding Sonoma County.