Welcome to On Site Auto Repair!
About On Site Auto Repair in Santa Rosa, CA
Trusted Since 2011 — Local Experts You Can Count On
At On-Site Auto Repair, we take pride in offering honest, skilled auto repair backed by decades of hands-on experience. As a family-owned shop in Santa Rosa, we treat every customer like a neighbor and every car like our own.
Serving Santa Rosa Since 2011
★★★★★ 4.9/5 (117 Google Reviews)
Your Local Auto Repair Experts & Reliable Repairs
On Site Auto – Auto Repair Service in Santa Rosa, CA
At On Site Auto Repair, we take pride in delivering expert auto repair services with integrity and precision. Our certified mechanics have years of hands-on experience and are committed to keeping your vehicle running smoothly. Whether it’s brake repairs, transmission work, or routine maintenance, we treat every car like it’s our own. As a locally owned and operated shop in Santa Rosa, we’re here to serve our community with honest diagnostics, transparent pricing, and fast, dependable service. When you choose us, you’re not just a customer—you’re part of the On Site Auto Repair family.
A Team You Can Trust
Our team is made up of ASE-certified technicians who are passionate about cars and dedicated to honest, accurate service. Whether you’re driving an everyday commuter, a classic car, or a light-duty truck, we bring the same level of precision and care to every job—big or small.
We believe in doing the job right the first time, using the latest diagnostic tools and quality parts to ensure lasting results. From brake repairs and oil changes to engine diagnostics, suspension work, and full transmission service, we’ve got you covered.
Visit us at 363 W 9th St B & C, Santa Rosa, CA 95401
Call us today at (707) 326-8655 to schedule your next service.
ReviewsWhat Our Clients Say
Brands We ServiceAuto Repair Brand
Toyota Repair
Honda Repair
Ford Repair
Chevrolet Repair
Nissan Repair
Mercedes Repair
Lexus Repair
Acura Repair
Infiniti Repair
Kia Repair
Hyundai Repair
Subaru Repair
Mazda Repair
Volkswagen Repair
Contact Info
Location
363 W 9th St B & C
Santa Rosa, CA 95401
Phone
707-326-8655
Hours
- Monday-Thursday: 7:30 AM - 4:30 PM
- Friday: 7:30 AM - 12:00 PM
- Saturday: Closed
- Sunday: Closed
New Customer Special:
$25 off your first service over $100. New customers only. One per household. Mention this offer when you call. Valid through December 31, 2026.
Oil Change Special:
Full synthetic oil change for $69.99. Includes up to 5 quarts of oil and a new oil filter. Most cars and light trucks. Valid through December 31, 2026.
Free Brake Inspection
Free brake inspection. We check pads, rotors, fluid, and lines and give you a written report. No purchase required.
Latest News
Expert Chevy Repair Services at On Site Auto Repair in Santa Rosa
Many Chevy owners in Santa Rosa rely on On Site Auto Repair for top-notch repair services. From routine maintenance to complex engine repairs, their team of skilled technicians ensures precision and reliability in every job. Trust your Chevy with the experts at On...
Reliable Honda Repair Services by On Site Auto Repair in Santa Rosa
There's no need to gamble with the safety and performance of your Honda when On Site Auto Repair in Santa Rosa offers reliable and expert repair services. Trust your vehicle to skilled technicians who specialize in Honda models, ensuring quality repairs that...
Toyota Repair Specialists in Santa Rosa – On Site Auto Repair
Toyota owners in Santa Rosa, rejoice! In terms of your vehicle's maintenance and repair needs, it's crucial to entrust it to specialists who understand the make inside out. At On Site Auto Repair, our team of expert technicians is dedicated to providing top-notch...
Professional Brake Repair Services at On Site Auto Repair in Santa Rosa
With safe and efficient braking being paramount for a smooth driving experience, ensuring your vehicle's brakes are in top-notch condition is crucial. On Site Auto Repair in Santa Rosa offers professional brake repair services to keep you and your passengers safe on...
Comprehensive Engine Repair Solutions in Santa Rosa by On Site Auto Repair
Most car owners dread the ominous check engine light, signaling potential trouble under the hood. Fear not, as On Site Auto Repair in Santa Rosa offers comprehensive engine repair solutions to keep your vehicle running smoothly. From diagnosing mysterious knocks and...
Water Pump Repair – Trust On Site Auto Repair in Santa Rosa
With On Site Auto Repair in Santa Rosa, you can trust your water pump repair to skilled technicians who come to you. Don't risk driving with a faulty water pump - overheating can cause costly engine damage. Stay safe on the road and schedule a convenient time for a...
Is Your Transmission In Need Of TLC? Trust Santa Rosa's Transmission Repair Specialists For Unrivaled Expertise!
In the matter of the health and longevity of your vehicle, one of the most crucial components to maintain is the transmission. The transmission plays a vital role in ensuring smooth shifting and optimal performance, making it crucial to keep it in top condition. If...
Prepare Your Car for Summer – Essential Services for Safe Travels
You love hitting the road during the summer months, but before you initiate on any adventure, you must ensure your car is in top shape. From scorching temperatures to long road trips, your vehicle needs proper care to keep you safe on the road. In this blog post, we...
Get Road Trip Ready – Summer Auto Repair Services in Santa Rosa, CA
With the summer season approaching, it's time to ensure your vehicle is road trip ready to fully enjoy the sunny days ahead. In Santa Rosa, CA, expert auto repair services are readily available to help you get your car in top shape for your summer adventures. From...
Keep Your Car Cool – Summer Services for Smooth Driving
You rely on your vehicle to get you from point A to point B, especially during the hot summer months. To ensure your car stays cool and runs smoothly, it's important to give it the proper care and attention it needs. From checking the air conditioning system to...
Read More About Our Auto Mechanic Services
On Site Auto Repair in Santa Rosa is a full service auto mechanic shop. Our auto mechanics are certified and are here to help with all of your repair needs. No auto repair job is too big or too small for On Site Auto Repair. We handle all types of auto repair, including regular maintenance, engine repair, brake work, and troubleshooting. If you are looking for honest and reliable auto mechanics, give us a call today. Ask us about our new customer specials.
Vehicles are usually described as 5 speed or 6 speed, meaning they have that many gear ratios. Those gears let the vehicle travel across the full range of speeds and use the engine's power efficiently. Transmissions are complex and are in constant use, so they take a lot of wear and tear. Many owners also forget to check and change the fluid on a regular schedule. That is why transmission problems are so common. At On Site Auto Repair in Santa Rosa, our transmission technicians can diagnose, repair, or replace your transmission. If you are looking for an honest transmission repair shop, give us a call today.
There are several warning signs that your vehicle can give you before your brakes may reach the point of potential failure or extensive repair. Whether composed of ceramic, semi-metallic, or organic materials, brake pads erode each time you depress the brake pedal. If the pads wear down too much without being replaced, the metal housing for the pads will make contact with the metal rotors (or drums), which may produce not only a safety issue but a situation where the rotors/drums are required to be replaced as a result of the prolonged contact of metal parts without the pad buffer. If you are in need of an affordable brake repair mechanic in Santa Rosa, please do not hesitate to schedule an appointment today!
Vehicle Inspection In Santa Rosa
The key to top notch automotive repair and troubleshooting lies in a thorough understanding of what’s actually going on under the hood. Sure, you know that a radiator keeps your engine cool, but understanding how it keeps it cool is the key to solving technical problems efficiently. If you know which parts perform what function, your powers of diagnosis will be much more powerful.
Radiator Inspection Service In Santa Rosa
Ensuring that your vehicle’s engine cooling system is in proper operating condition is extremely essential to engine life and performance. Operating at excessive temperatures can lead to premature engine wear. Your vehicle’s engine cooling system should be checked periodically, and a radiator coolant flush is also recommended to prohibit radiator corrosion. On Site Auto Repair will thoroughly drain and power flush the old coolant and particulates, and refill the cooling system with your vehicle manufacturer’s recommended coolant.
Our Santa Rosa Service Area – Directions to On Site Auto
Proudly serving drivers throughout Santa Rosa neighborhoods, from Railroad Square to Bennett Valley, and extending our trusted auto repair services to Petaluma, Sebastopol, Windsor, and all of Sonoma County.
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.
Our Santa Rosa Service Area – Directions to On Site Auto
Proudly serving drivers throughout Santa Rosa neighborhoods, from Railroad Square to Bennett Valley, and extending our trusted auto repair services to Petaluma, Sebastopol, Windsor, and all of Sonoma County.
We Service Clients From All Over Sonoma County
From Wine Country commuters to local families, we provide reliable auto repair services to Santa Rosa, Petaluma, Sebastopol, Rohnert Park, Windsor, Healdsburg, and communities throughout Sonoma County.
Things To Do In Santa Rosa, CA
From exploring the Charles M. Schulz Museum and Luther Burbank Home & Gardens to enjoying outdoor adventures at Spring Lake Regional Park and Annadel State Park, Santa Rosa offers endless opportunities for family fun, Wine Country experiences, and recreational activities that keep our community vibrant year-round.
Santa Rosa Transportation to On-Site Auto Repair
Conveniently located in the historic Railroad Square district with easy access from Highway 101, our auto repair shop is just minutes from downtown Santa Rosa, Santa Rosa Plaza, and all major neighborhoods, with nearby public transit options and walkable access to local shops and restaurants while your vehicle is being serviced.
Contact On-Site Auto Repair Today
Ready to experience honest, reliable auto repair in Santa Rosa?
Whether you're dealing with a check engine light, need routine maintenance, or facing an unexpected breakdown, our ASE-certified mechanics are here to help. We serve drivers throughout Santa Rosa and Sonoma County with the same commitment to quality and honesty that has made us the area's most trusted auto repair shop.