Welcome to On Site Auto Repair!
Auto Mechanic in Rohnert Park, CA — On-Site Auto Repair
you don’t have to rearrange your whole day.
A Mechanic That Actually Comes to You in Rohnert Park
Most people dread car trouble. Not because of the repair itself, but because of everything that comes with it. Rearranging your schedule. Finding a ride home from the shop. Waiting in a plastic chair under fluorescent lights for hours. Then getting a call about extra charges nobody warned you about.
We built On-Site Auto Repair to fix exactly that.
We’re a licensed Automotive Repair Dealer (ARD) serving Rohnert Park, CA and the broader Sonoma County area. Our mobile mechanic service brings professional diagnostics and repairs directly to wherever your car is — your driveway in University Park, a parking lot near Sonoma State University, your office by SOMO Village, or anywhere else in the 94928 zip code.
You don’t come to us. We come to you.
If you’re in Rohnert Park, Cotati, Petaluma, Santa Rosa, or Sebastopol and you need a mechanic you can actually trust, keep reading.
How It Works
We’re proud to serve both individual drivers and business fleet owners across Sonoma County.
If you’ve got one car that needs an oil change, we’ve got you. If you manage a fleet of delivery vans and need a reliable maintenance partner who won’t drag your drivers off the road for hours, we’ve got you too.
Our fleet service clients get scheduled maintenance programs that keep vehicles serviced on a predictable timeline, which means fewer unexpected breakdowns and more uptime.
Auto Repair Services We Offer in Rohnert Park
We handle a wide range of repairs and maintenance services on-site. Whether it’s routine upkeep or something more serious your check engine light has been warning you about, we’ve got you covered.
Routine Maintenance
- Oil and filter changes (conventional and synthetic motor oil)
- Tire rotation and balancing
- Cabin, air, and fuel filter replacements
- Spark plug replacement
- Cooling system service and coolant flush
- Transmission fluid service
- Belts and hoses inspection and replacement
- Scheduled preventive maintenance
Diagnostics and Inspections
- Check engine light diagnosis using OBD-II scanners and professional scan tool software
- Full vehicle health checks and 150-point inspections
- Pre-purchase vehicle inspections (before you buy a used car)
- Computerized diagnostics for engine, transmission, and electrical systems
Mechanical Repairs
- Brake inspection, pad and rotor replacement
- Battery testing and replacement
- Alternator and starter repair
- Suspension and steering repair
- Engine repair and service
- Transmission service
- Cooling and heating system repairs
Specialty Services
- Smog check preparation and readiness testing
- Hybrid vehicle service
- Fleet vehicle maintenance programs
- Roadside assistance for breakdowns in the Rohnert Park area
We work on sedans, coupes, SUVs, crossovers, trucks, pickups, minivans, hybrid vehicles, and gas and diesel-powered vehicles of all makes and models.
What Makes On-Site Auto Repair Different
A lot of shops in the area do solid work. We’re not here to knock them. But on-site service is a different category, and most traditional shops simply can’t offer it.
Here’s what you get when you choose us:
No towing costs. If your car won’t start or something breaks down near Graton Resort, the Ladybug Park area, or anywhere in between, we come to you. No tow truck needed for most jobs.
No shop wait. You stay home. You go to work. You live your life. We handle the repair and call you when it’s done.
Full transparency, every time. California law requires us to give you a written estimate before we touch anything. We do that, and we explain every line item in plain language. No surprises on the final bill.
ASE-certified technicians. Our mechanics hold ASE (Automotive Service Excellence) certifications. That’s the national standard for automotive repair quality. When an ASE-certified tech works on your car, you know they’ve tested and proven their skills, not just picked up a wrench.
Parts and labor warranty. We back our work. If something we repaired isn’t right, we make it right.
Serving Every Corner of Rohnert Park and Beyond
We know Rohnert Park well. Our customers live in neighborhoods like Mountain Shadows, Honey Brook, Springwood, and the Sonoma Racquet Club community. We service vehicles for families near Spreckels Performing Arts Center and for students and staff in the Sonoma State University area.
If you’re outside Rohnert Park proper, we also serve:
- Cotati, CA — just a few miles south
- Petaluma, CA
- Santa Rosa, CA
- Sebastopol, CA
- Novato, CA
Not sure if we come to your area? Call us and ask. We’re easy to talk to.
What Our Customers Say
People in Rohnert Park come to us because they’re tired of the runaround. Here’s the kind of feedback we hear:
“I didn’t have to call a tow truck, find a ride, or sit in a waiting room. He showed up, diagnosed the problem, fixed it, and left. That’s exactly what I needed.”
“Most honest mechanic I’ve worked with in Sonoma County. Told me what needed to be fixed now and what could wait — and didn’t try to upsell me on stuff I didn’t need.”
“Fast, knowledgeable, and they explained everything in plain language. I actually understood what was wrong with my car for once.”
Our Credentials and Commitments
We know there’s no shortage of mechanics in Rohnert Park and Sonoma County. So here’s exactly why you can trust On-Site Auto Repair with your vehicle:
- California BAR Licensed — We’re a registered Automotive Repair Dealer (ARD) with the California Bureau of Automotive Repair. This is required by law to charge for vehicle repair in California, and it means we follow state standards.
- ASE-Certified Technicians — Our mechanics have earned Automotive Service Excellence certification. It’s not a marketing badge. It’s proof of verified technical competence.
- Written Estimates, Always — Required by California law and enforced by us regardless. You’ll never be surprised by your bill.
- Parts and Labor Warranty — We back every repair we do.
- Years Serving Rohnert Park — We’ve been in the community long enough to have a reputation worth protecting.
- 5-Star Reviews on Google and Yelp — Don’t take our word for it. Read what your neighbors say.
- Better Business Bureau Accredited — We maintain a BBB accreditation because accountability matters.
Ready to Book a Mechanic in Rohnert Park?
If your car needs attention and you’d rather not deal with towing it somewhere and waiting around all day, we’re ready to help.
Call us to describe what’s going on. If we can fix it on-site, we’ll schedule a time that works for you. If it’s something we can’t handle mobile, we’ll tell you straight and point you in the right direction.
We serve Rohnert Park, Cotati, Petaluma, Santa Rosa, Sebastopol, Novato, and the wider Sonoma County area. Same-day appointments available for many services.
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 CA drivers.
How does on-site auto repair actually work?
It's straightforward. You call or book online, tell us what's going on with your vehicle, and we schedule a time to come to you. Our mechanic shows up with the tools, equipment, and parts needed for your job. We do the work on-site — in your driveway, at your workplace, wherever works for you. We give you a written estimate upfront, get your approval, do the repair, and then you pay when it's done. That's it.
Are mobile mechanics as qualified as shop mechanics?
Yes. Our technicians hold ASE certifications, the same credential you'd look for at any traditional shop. The work we do meets the same quality standard. The only difference is we bring the work to you. We also carry professional-grade diagnostic equipment, including OBD-II scanners, multimeters, and pressure gauges, so we're not cutting corners on the technical side.
What if my car needs a repair that can't be done on-site?
It's rare, but it happens. Some jobs — like major engine rebuilds or certain transmission overhauls — require a lift or specialized shop equipment. If we get to your vehicle and find that's the case, we'll be straight with you. We'll let you know what's needed and help you figure out next steps. We won't charge you for a job we can't finish.
Do I get a written estimate before anything is done?
Yes. Always. California law requires it, and we think it's just the right thing to do. You'll see exactly what we're recommending, why, and what it costs before we start any work. You're in control. Nothing happens without your approval.
Does my warranty get voided if I use an independent mechanic instead of the dealership?
No. Under the federal Magnuson-Moss Warranty Act, your car's warranty cannot be voided just because you chose an independent mechanic for service and maintenance. The dealership can require you to use them for specific warranty repair work, but routine maintenance and repairs don't have to go through them. Many Rohnert Park drivers pay significantly more at dealerships without any warranty benefit for doing so.
How much does an on-site mechanic cost compared to a shop?
People often assume mobile service costs more. It usually doesn't — and when you factor in what you save on a tow truck, a rental car, or a day off work, it's almost always less. We keep our pricing fair and transparent. The written estimate you get before we start is the price you pay. No shop fees. No "environmental charges" buried at the bottom.
What areas near Rohnert Park do you cover?
We cover Rohnert Park and the surrounding Sonoma County communities, including Cotati, Petaluma, Santa Rosa, Sebastopol, and Novato. If you're not sure whether we reach your location, just give us a call and we'll tell you straight.
ReviewsWhat Our Clients Say
