Welcome to On Site Auto Repair!
Auto Repair in Rohnert Park, CA | On-Site Auto Repair
Your car breaks down. You don’t have time to wait three days for a shop appointment. You can’t sit in a waiting room for two hours. And you definitely don’t want to pay dealership prices just to find out what’s wrong.
That’s exactly why On-Site Auto Repair exists. We’re a locally owned auto repair service based in Rohnert Park, CA, and we bring the repair shop to you. Whether you’re at home near the Sonoma State University area, parked near the Rohnert Park Expressway, or stuck at work along Commerce Blvd, we come to your vehicle with the tools, parts, and know-how to get you back on the road.
No tow trucks. No waiting rooms. No surprises on your bill.
Why Rohnert Park Drivers Choose On-Site Auto Repair
We come to you. That’s the biggest thing. You don’t lose half a day dropping off your car, arranging a ride, and waiting for a callback. We show up at your home, your workplace, or wherever your vehicle is parked and handle the repair right there.
No shop overhead means better pricing. Traditional repair shops carry the cost of a building, utilities, and front-desk staff. We skip all that. The savings go to you in the form of fair, transparent pricing with no hidden fees.
You always know the cost before we start. We give you a written repair estimate before touching your car. California law (through the Bureau of Automotive Repair) requires this, and we follow it every time. No surprises.
We’re ASE certified. ASE certification means our mechanics have passed nationally recognized tests in specific repair categories. It’s the industry standard, and it matters when someone is working on your car.
We’re California BAR licensed. Every auto repair shop in California is required to hold a valid license from the Bureau of Automotive Repair. Ours is current. You can verify it. We’re not going anywhere.
Parts and labor warranty. We stand behind our work. Every repair comes with a parts and labor warranty so you’re covered if something goes wrong after we leave.
Real reviews from real customers. Our 5-star Google reviews and Yelp reviews come from people in Rohnert Park, Cotati, Santa Rosa, Petaluma, and across Sonoma County. We’ve built our reputation one honest repair at a time.
How It Works
Getting your car repaired through On-Site Auto Repair is straightforward.
Step 1: Call or book online. Tell us what’s going on with your vehicle. We’ll ask a few questions to help us show up prepared.
Step 2: We come to you. Pick a time that works for you. We’ll arrive at your home, your workplace, or wherever your car is parked in the Rohnert Park area.
Step 3: We diagnose and give you a written estimate. Before any work begins, we tell you exactly what we found and what it will cost to fix it.
Step 4: We do the repair. With your approval, we get to work using professional tools and quality parts. Most common repairs are done the same day.
Step 5: We do a test and confirm the fix. We don’t leave until the job is done right. Every repair gets checked before we call it finished.
Auto Repair Services We Offer in Santa Rosa, CA
Our shop at 363 W 9th St B & C handles a wide range of repairs and maintenance for drivers across Santa Rosa and Sonoma County.
Engine Diagnostics and Check Engine Light
A check engine light means your car is reporting a fault. We connect an OBD-II scanner, read the fault codes, and explain what they mean in plain language. We diagnose the problem first, then tell you what the repair will cost.
Oil Change Service
We do full-synthetic and conventional oil changes. We use the viscosity grade your manufacturer specifies, such as 5W-30, 5W-20, or 0W-20, and we replace the oil filter every time.
Brake Repair and Replacement
Worn brake pads squeak. Worn rotors grind. A soft brake pedal is a warning. We inspect and replace brake pads, rotors, and calipers using OEM-quality and aftermarket parts, depending on your budget.
Battery, Alternator, and Starter Repair
We test your battery with a load tester, not just a voltage check. We also test the alternator and starter, because a failing alternator will kill a new battery quickly.
AC and Heating Repair
If your AC is not blowing cold, we recharge the refrigerant and check for leaks. If your heat is not working, we diagnose the cause and repair it.
Scheduled Maintenance and Tune-Ups
We handle spark plug replacement, belt inspection and replacement, air and cabin filter replacement, fuel system service, coolant flushes, and transmission fluid service. If you are not sure what your car is due for, we look it up by make, model, and mileage.
Tire Rotation and Inspection
Uneven tire wear affects handling, fuel economy, and tire life. We rotate your tires, measure tread depth, inspect the sidewalls, and check the pressure.
Pre-Purchase Inspection
Thinking about buying a used car? We check the brakes, belts, fluids, undercarriage, and suspension, and we run a diagnostic scan for hidden fault codes. Call for current pricing.
Why Santa Rosa Drivers Choose On Site Auto Repair
Free estimates. You know the cost before we start any work.
Same-day appointments available. Call and we will tell you what we can fit in today.
ASE Certified mechanics. Credentialed professionals with real diagnostic tools.
Convenient location. We are in Railroad Square, minutes from downtown Santa Rosa, with shops and restaurants in walking distance while you wait.
Ready to Book?
Call (707) 326-8655 or send us a message with your vehicle and what is going on with it. We will give you a free estimate before we schedule anything.
On Site Auto Repair — 363 W 9th St B & C, Santa Rosa, CA 95401. Serving Santa Rosa, Petaluma, Rohnert Park, Sebastopol, Windsor, Healdsburg, and Sonoma County.
Frequently Asked Questions
Our certified mechanics answer the most common car repair questions to help you stay informed and confident. Explore our FAQs for honest, expert advice trusted by Rohnert Park, CA drivers.
Do you charge more than a regular shop because you come to me?
Not necessarily. Because we don't carry the overhead costs of a physical shop (rent, utilities, front-desk staff), we're often priced the same or better than traditional shops for common repairs. You also save time you'd otherwise spend dropping off and picking up your car, which has its own value. We give you a written estimate before starting any work, so you always know the cost upfront.
What types of vehicles do you work on?
We work on most passenger vehicles, including domestic and foreign cars, SUVs, trucks, minivans, and hybrids. If you drive something less common, just give us a call and describe the vehicle. We'll tell you straight whether it's something we can handle or whether you'd be better served by a specialist.
Is it safe to have someone repair my car at my home or workplace?
Yes. We're a licensed auto repair business in California, which means we're regulated by the Bureau of Automotive Repair. Our mechanics are ASE certified, carry the proper tools, and follow safe work practices. We're not some guy from Craigslist. We're a legitimate local business with verifiable credentials and real customer reviews you can read before booking.
What if the repair turns out to be more complex than expected?
We'll call you before doing anything beyond what we quoted. California law requires this, and it's just the right thing to do. If we diagnose a deeper issue, we'll explain it clearly, give you a revised estimate, and let you decide how to proceed. You're never stuck with a surprise bill.
Do your repairs come with a warranty?
Yes. Our work comes with a parts and labor warranty. The specific terms depend on the repair, and we'll walk you through what's covered before we start. If something isn't right after we've done the work, contact us and we'll make it right.
Can you handle my car's check engine light?
In most cases, yes. We use an OBD-II scanner to pull the diagnostic codes from your vehicle's computer, identify the root cause, and explain what it means in plain English. Some codes are minor. Some point to something that needs attention soon. We'll tell you the difference and give you options without pushing you toward unnecessary repairs.
I live near Santa Rosa or Petaluma. Can you still come to me?
We regularly serve customers in Santa Rosa, Cotati, Petaluma, Sebastopol, and nearby communities in Sonoma County. If you're within our service area, booking works the same way. Not sure? Give us a call and we'll confirm before you schedule anything.
ReviewsWhat Our Clients Say
