Welcome to On Site Auto Repair!
Auto Repair in Santa Rosa, CA
Auto repair in Santa Rosa, CA: brake repair, oil changes, engine diagnostics, transmission service, timing belt and water pump replacement, suspension and steering repair, check-engine light troubleshooting, AC recharge and repair, tire services and alignments, and California smog checks.
Visit our Santa Rosa location today for top-notch auto repair services!
Our Auto Repair Services in Santa Rosa, CA
Brake Repair Santa Rosa, CA
Brake Repair in Santa Rosa, CA? Stop brake squeal, vibration, and stops caused by Fountaingrove hills, wet winter commutes on Highway 12, and potholes along Stony Point Road. Technicians service pads and shoes, machine or replace rotors and drums, flush brake fluid, repair calipers and wheel cylinders, and diagnose ABS lights. Local familiarity with SMART train crossings, downtown stop‑and‑go, and trips to Bodega Bay ensures solutions that shorten stopping distances and prevent uneven wear. Get fast appointments, estimates, and road‑test validation on Mendocino Avenue. Schedule Brake Repair in Santa Rosa, CA for Brake Repair in Santa Rosa, CA today.
Radiator Repair Santa Rosa, CA
Stuck in Highway 101 traffic, overheating can escalate fast. Choose Radiator Repair in Santa Rosa, CA to pinpoint leaks, failing thermostats, water pumps, and clogged fins from vineyard dust. We pressure-test, verify coolant circulation, flush contaminated coolant, replace hoses and belts, and restore proper operating temperature. Local techs understand Sonoma County stop‑and‑go, summer heat, and morning starts that stress cooling systems. Get diagnosis and fixes to prevent head gasket damage. Near downtown and Bennett Valley, book Radiator Repair in Santa Rosa, CA. Need preventive maintenance or emergency help? Ask about Radiator Repair in Santa Rosa, CA here today.
Check Engine Light Repair Santa Rosa, CA
Get Check Engine Light Repair in Santa Rosa, CA that comes to you. We use factory-level scanners, smoke testing for EVAP leaks, and live-data tests on Highway 101 to isolate misfires, O2 sensor faults, and catalytic converter efficiency issues. Avoid failed Sonoma County smog checks, wasted parts, and repeat lights. We diagnose hard cold-start problems in morning fog, rough idle after vineyard dust, and loose gas-cap codes after fuel stops. We serve Rincon Valley, Bennett Valley, Roseland, and downtown. Book Check Engine Light Repair in Santa Rosa, CA today. Choose expertise: Check Engine Light Repair in Santa Rosa, CA.
Auto AC Repair Santa Rosa, CA
Choose Auto AC Repair in Santa Rosa, CA when foggy mornings, 101 traffic, and heat strain your climate system. EPA 609-certified techs diagnose leaks, weak airflow, and warm vents with computer scans and pressure testing. We service R-134a and R-1234yf refrigerant, repair compressors, condensers, and evaporators, and replace heater cores, thermostats, and blend doors for reliable defrost on Bennett Valley and downtown routes. We clear wildfire ash, vineyard dust, and redwood pollen from cabins and filters, restore cooling fast, and prep systems before heat waves. Book Auto AC Repair in Santa Rosa, CA to stay comfortable and focused. daily.
Oil Change Santa Rosa, CA
Get an Oil Change in Santa Rosa, CA tailored to local driving. Stop-and-go on 101, trips up Mendocino Ave, and dusty vineyard roads strain engines and clog filters. We follow manufacturer specs, protect warranties, and use the right viscosity for summer heat and wet winters. Choose synthetic or high-mileage blends, replace filters, top fluids, and test batteries while you wait. We service Toyota, Honda, Subaru, Ford, Chevy, Lexus, Hyundai, and more. Reduce fuel use, quiet cold startups, and prevent leaks before coast or Bennett Valley drives. Book: Oil Change in Santa Rosa, CA done right by local technicians today.
Suspension Repair Santa Rosa, CA
Need Suspension Repair in Santa Rosa, CA? Potholes from winter storms on Highway 12, Stony Point, and downtown streets knock alignments out, bend wheels, and cause clunks. We diagnose noises, uneven tire wear, pulling, and steering play; replace shocks/struts, ball joints, control arms, tie rods, bushings; service power steering racks; and perform four-wheel alignments for stable braking on 101. Local vineyard lanes and steep driveways demand tight suspension. Get clear estimates, quality parts, and test drives on real routes. Book Suspension Repair in Santa Rosa, CA. Choose Suspension Repair in Santa Rosa, CA to protect tires, handling, and comfort.
Tire Shop Santa Rosa, CA
Need tires now? A Tire Shop in Santa Rosa, CA helps you handle potholes on Stony Point Road, wet streets, and Highway 101 commutes. Get tire mounting with torque set to spec, valve stem and TPMS service, computer balancing to stop shake, and puncture repairs for nail-strewn sites after storms. Choose Michelin, Bridgestone, Goodyear, or Continental sized for Toyota, Subaru, Ford, or Lexus. We diagnose pull, vibration, and uneven wear from Sonoma backroads and vineyard gravel, align or rotate as needed. Drop in for quick flats or replacements and keep rolling with this Tire Shop in Santa Rosa, CA.
Transmission Repair Santa Rosa, CA
Need Transmission Repair in Santa Rosa, CA? Stop highway 101 shudder, vineyard-grade slipping, and uphill Bennett Valley clunks with precise diagnostics, fluid exchanges, filter replacement, clutch service, CV axle repair, transfer case work, and complete rebuilds for automatic and manual gearboxes. We service Ford, Chevy, Toyota, Honda, Subaru, Lexus, Hyundai, Acura, and more. Get same-day testing to find leaks, worn solenoids, and overheating from summer climbs and stop‑and‑go traffic. Benefit from clear estimates, locally sourced parts, and repairs that keep you commuting to downtown, SRJC, and Windsor reliably. Book Transmission Repair in Santa Rosa, CA today for accurate fixes.
About Our Auto Repair Shop in Santa Rosa, CA
On Site Auto Repair has proudly served Santa Rosa drivers since 2011, earning a reputation as the best auto repair shop in the area. Our family-owned facility at 363 W 9th St is staffed by ASE-certified auto mechanics who bring over 25 years of combined experience to every vehicle we service.
From Downtown Santa Rosa to Roseland, Bennett Valley to Fountaingrove, we're the local car repair specialists your neighbors trust. Our team delivers comprehensive services including brake repair, engine repair, transmission repair, and radiator repair using state-of-the-art diagnostic equipment.
Whether you're dealing with a check engine light repair or need specialized import car repair for your Toyota, Honda, Subaru, or Lexus, we treat every vehicle like our own. We also service domestic brands including Ford, Chevy, and Dodge with the same precision and care.
Visit us today and discover why over 100 customers have rated us 4.8/5 stars. At On Site Auto Repair, you're not just a customer—you're family.
Call (707) 326-8655 to schedule your Santa Rosa auto repair appointment.
About Santa Rosa, CA
Santa Rosa blends historic Railroad Square and California mission-era roots with a modern hub for healthcare, education, and small manufacturing. Residents value its walkable downtown, creekside trails, and community parks. Businesses benefit from access to Highway 101 and a skilled workforce. Notable landmarks include Courthouse Square, Santa Rosa City Hall, Santa Rosa Memorial Hospital, Howarth Park, and the Flamingo Resort. Technicians handle routine maintenance and complex diagnostics at homes and workplaces near landmarks like Courthouse Square, Howarth Park, and the South A Street Arts District. They navigate neighborhood traffic patterns, bring OEM-quality parts, and use mobile lifts and scanners to complete brakes, batteries, alternators, tune-ups, and inspections on-site—reducing tow needs and downtime for Santa Rosa drivers.
Santa Rosa's population is 178,127. City center coordinates: 38.4405, -122.7144. The city has a warm-summer Mediterranean climate with dry, hot afternoons, cool marine evenings, and winter rains. On Site Auto Repair schedules mobile service to avoid midday heat, checks cooling systems and battery health, and uses corrosion-resistant parts, low-VOC fluids, and CARB-compliant components to meet California regulations. In Rincon Valley, we handle brake and battery issues on-site. Junior College area gets quick diagnostics near campus. Roseland residents get mobile alternator and starter repairs. Bennett Valley sees fluid leaks fixed curbside. West End receives emergency roadside engine troubleshooting. We use recycled materials and sustainable methods whenever possible, reducing waste while supporting Santa Rosa’s community through local sourcing and partnerships that keep work and dollars here in Sonoma County. For reliable Auto Repair services in Santa Rosa, contact On Site Auto Repair today.
Cities We Serve
Broken Clouds
Temperature
Wind Speed
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Neighborhoods We Serve
Downtown Santa Rosa, Roseland, Bennett Valley, Fountaingrove, Junior College, Rincon Valley, Montgomery Village, Oakmont Village, Skyhawk, Northwest Santa Rosa, Southwest Santa Rosa, Middle Rincon, Wright Area Action Group, Burbank Gardens, West End, Railroad Square, Proctor Terrace, McDonald Avenue, Montecito Heights, Bellevue Ranch, South Park, SOFA Arts District, Coffey Park, Moorland, Ridgway Historic District,
Things to Do
Charles M. Schulz Museum and Research Center
Children's Museum of Sonoma County
Railroad Square Historic District
Howarth Park
Safari West
Trione-Annadel State Park
Luther Burbank Home & Gardens
Pacific Coast Air Museum
Spring Lake Park
Matanzas Creek Winery
Museum of Sonoma County
Juilliard Park
Balletto Vineyards
Hook & Ladder Vineyards & Winery
Snoopy's Home Ice
California Indian Museum & Cultural Center
Kendall-Jackson Wine Estate & Gardens
Santa Rosa Wednesday Night Market
Paradise Ridge Winery
Sugarloaf Ridge State Park
Transportation
Santa Rosa Transit Mall
Coddingtown
Santa Rosa CityBus - Fixed Route and Paratransit
Santa Rosa Ave & East Robles Ave
Greyhound
Santa Rosa Ave at Sebastopol Ave
Santa Rosa Ave & East Robles Ave
Santa Rosa Ave & Bellevue Ave
Santa Rosa City Bus
Piner Rd & Industrial Dr
Santa Rosa Ave at Colgan Ave
Third St & E St
Santa Rosa Junior College
Santa Rosa Ave at Burt St
Santa Rosa Ave & Commercial Ct (Market Place)
Third St at E St
Court St at Santa Rosa Ave
Santa Rosa Ave & Yolanda Ave
Santa Rosa Ave & Court Rd
Santa Rosa Ave & Court St
Driving Directions
Driving Directions from Hahn Automotive to On Site Auto Repair
Driving Directions from All Around Auto Repair to On Site Auto Repair
Driving Directions from Bonanno Automotive to On Site Auto Repair
Driving Directions from Santa Rosa Transmission & Car Care to On Site Auto Repair
Driving Directions from Wayne & Sons Automotive Repair, LLC to On Site Auto Repair
Driving Directions from GreenTech Automotive to On Site Auto Repair
Driving Directions from Fix Auto Santa Rosa to On Site Auto Repair
Driving Directions from Larsen Auto Care / Sales to On Site Auto Repair
Driving Directions from North Bay Bavarian to On Site Auto Repair
Driving Directions from Coogler's Auto Repair to On Site Auto Repair
Driving Directions from Tristar Automotive to On Site Auto Repair
Driving Directions from Ultimate Auto Care to On Site Auto Repair
Driving Directions from AAA Santa Rosa Baker Auto & Tire Center to On Site Auto Repair
Driving Directions from Local Heroes Auto Care to On Site Auto Repair
Driving Directions from ABC Auto Repair to On Site Auto Repair
Driving Directions from Sartorial Auto Repairs to On Site Auto Repair
Driving Directions from Rincon Valley Auto Repair to On Site Auto Repair
Driving Directions from Bavarian Performance to On Site Auto Repair
Driving Directions from CK Auto Exclusive to On Site Auto Repair
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 Santa Rosa drivers.
Do you provide loaner cars or shuttle service?
While we don't provide loaners, we're located in downtown Santa Rosa's Railroad Square with easy access to shopping, dining, and public transportation while you wait.
Can you work on my vehicle if it's still under warranty?
Absolutely! We perform warranty-compliant maintenance and repairs. We use OEM or equivalent parts to maintain your vehicle's warranty coverage.
How do I know if I really need the recommended service?
We provide detailed explanations and show you exactly what needs attention. We never pressure you into unnecessary repairs - our reputation depends on honest service.
Do you offer payment plans for major repairs?
We accept cash, check, and all major credit cards. For major repairs, we can discuss payment options that work for your budget.
What if my car breaks down outside of business hours?
Call our main number (707) 326-8655 and leave a message. We'll get back to you first thing in the morning to arrange service.
ReviewsWhat Our Clients Say
Brands We ServiceAuto Repair Brand
Toyota Repair
Honda Repair
Ford Repair
Chevrolet Repair
Nissan Repair
Hyundai Repair
Subaru Repair
Mazda Repair
Volkswagen Repair
BMW Repair
Mercedes Repair
Lexus Repair
Acura Repair
Infiniti Repair
Kia Repair
Contact Info
Location
363 W 9th St B & C
Santa Rosa, CA 95401
Phone
707-326-8655
Hours
- Monday-Friday: 8:00 AM - 5:30 PM
- Saturday: 8:00 AM - 4:00 PM
- Sunday: Closed
New Customer Special:
$25 Off First Service Over $100
Oil Change Special:
Full Synthetic Oil Change - $69.9
Free Brake Inspection
Complete brake system check at no charge
Latest News
Essential Hyundai maintenance tips for long-lasting performance
With regular maintenance, you can ensure that your Toyota performs at its best in the beautiful surroundings of Santa Rosa, CA. This guide offers imperative tips tailored to the unique driving conditions and climate in the area, helping you keep your vehicle in top...
Honda service specials at On Site Auto – Affordable solutions for your car
With regular maintenance, you can ensure that your Toyota performs at its best in the beautiful surroundings of Santa Rosa, CA. This guide offers imperative tips tailored to the unique driving conditions and climate in the area, helping you keep your vehicle in top...
Toyota maintenance tips to keep your vehicle running smoothly in Santa Rosa, CA
With regular maintenance, you can ensure that your Toyota performs at its best in the beautiful surroundings of Santa Rosa, CA. This guide offers imperative tips tailored to the unique driving conditions and climate in the area, helping you keep your vehicle in top...
Toyota maintenance tips to keep your vehicle running smoothly in Santa Rosa, CA
With regular maintenance, you can ensure that your Toyota performs at its best in the beautiful surroundings of Santa Rosa, CA. This guide offers imperative tips tailored to the unique driving conditions and climate in the area, helping you keep your vehicle in top...
Honda service specials at On Site Auto – Affordable solutions for your car
Most car owners understand the importance of regular maintenance, and at On Site Auto, we offer Honda service specials designed to keep your vehicle running smoothly without breaking the bank. You have access to expert technicians and a variety of affordable solutions...
Essential Hyundai maintenance tips for long-lasting performance
Most drivers want their Hyundai to perform at its best for years to come, and proper maintenance is key to achieving this goal. By following imperative tips tailored to your vehicle, you can ensure it runs smoothly and retains its value. From regular oil changes to...
Hyundai service center in Santa Rosa – Quality maintenance for your Hyundai
You deserve the best when it comes to maintaining your Hyundai, and the Hyundai service center in Santa Rosa offers just that. With experienced technicians and state-of-the-art equipment, you can trust that your vehicle will receive top-notch care. Whether you need...
BMW repair shop in Santa Rosa – Get your vehicle back on the road faster
You understand the importance of keeping your BMW in optimal condition for the best driving experience. When your vehicle requires repairs, finding a reliable BMW repair shop in Santa Rosa is imperative for quick and efficient service. This blog post will guide you...
Affordable RAM truck repairs at On Site Auto in Santa Rosa, CA
Santa Rosa is home to reliable, affordable RAM truck repairs at On Site Auto, where you can trust that your vehicle is in expert hands. With a team of skilled technicians specializing in RAM trucks, you can be confident that your repairs will be efficient and...
How to choose between Toyota and Honda for Santa Rosa drivers
Most Santa Rosa drivers find themselves torn between two of the most reliable and popular vehicle brands: Toyota and Honda. Both options offer a range of models that vary in style, performance, and features. In this guide, you'll discover key considerations to help...
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 here to help you with all of your automotive repair needs. No auto repair job is too big or too small for On Site Auto Repair.We specialize in all types of auto repair, including: regular maintenance, break/fix, engine repair, troubleshooting and much more! 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 or 6 “speed” meaning then have that many gear ratios to allow the vehicle to travel at the full range of speeds required and to make use of the engine’s output power as efficiently as possible. Due to their complexity, constant use and function within a vehicle’s operation, transmissions experience a lot of wear and tear. Add to this the fact that many owner’s forget to check and change the fluid on a regular basis and it’s easy to understand why so many people have transmission problems. At On Site Auto Repair in Santa Rosa, our transmission repair technicians can accurately diagnose, repair or replace your transmission. If your are looking for a reliable and honest transmission repair services company, 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.
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.