Welcome to On Site Auto Repair!
Auto Repair in Petaluma, CA
Reliable auto repair in Petaluma, CA, including brake repair, oil changes, check engine diagnostics, transmission service, AC and heating repair, tire rotation and alignment, battery replacement, suspension and steering work, and California smog check.
Schedule your next auto repair appointment in Petaluma, CA today and experience top-notch service!
Our Auto Repair Services in Petaluma, CA
Brake Repair Petaluma, CA
Brake Repair in Petaluma, CA demands solutions tailored to Highway 101 traffic, Lakeville Highway stop‑and‑go, and moisture that corrodes rotors. If you notice vibration on D Street descents, a soft pedal after flooding near the Petaluma River, or an ABS warning by East Washington Street, get prompt inspection. Technicians replace pads and shoes, resurface or replace rotors and drums, flush brake fluid, repair calipers and wheel cylinders, and diagnose ABS faults. Same-day service keeps commuters on schedule; transparent findings help you choose repairs. Schedule Brake Repair in Petaluma, CA to stop shorter, reduce noise, and handle Sonoma Mountain grades.
Radiator Repair Petaluma, CA
Radiator Repair in Petaluma, CA keeps you moving on Highway 101 and Lakeville Highway without overheating. If your temp gauge climbs in downtown stop-and-go or while towing on rural backroads, we diagnose quickly: pressure-test for leaks, check water pump circulation, verify thermostat operation, and test fans, hoses, belts, and radiator flow. We service Toyota, Honda, Ford, Chevy, Subaru, Lexus, Hyundai, and more. Get coolant flushes to prevent corrosion and replacement radiators when fins clog with roadside debris. Choose experts who understand Sonoma County commutes: schedule Radiator Repair in Petaluma, CA and ask about preventive Radiator Repair in Petaluma, CA.
Check Engine Light Repair Petaluma, CA
Get Check Engine Light Repair in Petaluma, CA when a misfire, rough idle, or gas cap code leaves you worried before a 101 commute or Lakeville Highway trip. We diagnose EVAP leaks for Sonoma smog checks, pinpoint sensor failures after Petaluma mornings, and catch coil, O2, or catalytic converter issues causing poor mileage on East Washington stop‑and‑go. Our advanced scan tools, smoke testing, and live data confirm the fix, not guesses. You approve repairs with clear estimates. Schedule Check Engine Light Repair in Petaluma, CA and keep the dash light off with Check Engine Light Repair in Petaluma, CA.
Auto AC Repair Petaluma, CA
Need Auto AC Repair in Petaluma, CA? Beat inland heat and foggy mornings with HVAC diagnostics, R-134a or R-1234yf recharges, compressor and condenser service, evaporator or heater core replacement, thermostat fixes, blend door repair, and leak detection. We handle Toyota, Honda, Ford, Chevy, Subaru, Lexus, and more. Petaluma’s coastal moisture, dairy dust, and vineyard pollen clog cabin filters and strain systems; we clean, test pressures, and restore airflow and reliable defrost for 101 commutes and drop-offs. Get seasonal checks before summer traffic or winter rain. Schedule Auto AC Repair in Petaluma, CA; choose Auto AC Repair in Petaluma, CA.
Oil Change Petaluma, CA
Schedule an Oil Change in Petaluma, CA to handle stop-and-go on Lakeville Highway, short trips downtown, and backroads toward Two Rock. Technicians follow factory specs, use the correct viscosity for Sonoma County temperatures, and reset maintenance lights. We replace oil and filters, top off fluids, check belts, and inspect for leaks after climbs over Sonoma Mountain. Quick service helps mileage, reduces engine wear, and keeps warranties valid. We recycle used oil under local regulations and advise on synthetic options for Highway 101 commutes. Book Oil Change in Petaluma, CA. Choose Oil Change in Petaluma, CA for dependable starts daily.
Suspension Repair Petaluma, CA
Suspension Repair in Petaluma, CA keeps your car stable on Highway 101, over D Street hills. If potholes from winter storms cause pulling, clunks, uneven tire wear, or a bouncy ride, we inspect shocks, struts, ball joints, and tie rods, then align wheels for straight tracking. Technicians service Ford, Toyota, Honda, Subaru, Chevy, Lexus, Hyundai, and more. We address power steering leaks for tight low-speed turns downtown and control in gusty crosswinds. Book Suspension Repair in Petaluma, CA to reduce braking distance, protect tires, and quiet cabin noise. Choose local expertise that understands rural backroads like Old Adobe Road.
Tire Shop Petaluma, CA
Need a Tire Shop in Petaluma, CA that fixes Sonoma County driving issues? We mount and balance tires precisely to stop Highway 101 vibration, repair punctures from downtown construction nails, and replace TPMS sensors failing after winters. Choose Michelin, Bridgestone, Goodyear, or Continental sized for Petaluma Boulevard curb clearances and farm-road ruts. We torque lugs correctly, install new valve stems, and road-force balance to eliminate shake on Lakeville Highway. Drop in for flat repair or full replacement before a commute. Book with our Tire Shop in Petaluma, CA. Your Tire Shop in Petaluma, CA solves tire wear fast today.
Transmission Repair Petaluma, CA
Need Transmission Repair in Petaluma, CA for slipping gears, hard shifts, or CVT judder? We diagnose, road-test on Washington Street and Highway 101, and service automatics and manuals, including Subaru AWD. Get fluid exchange with OEM-spec ATF (Toyota WS, Honda DW-1), filter replacement, clutch and flywheel service, axle seal repair, and transfer case maintenance for Sonoma Mountain grades and weekend towing. We handle Ford, Chevy, Toyota, Honda, Lexus, Acura, Hyundai, and more. Expect clear estimates, fast diagnosis, and fixes that prevent breakdowns on Adobe Road. Learn more: Transmission Repair in Petaluma, CA. Choose local Transmission Repair in Petaluma, CA.
About Us: Auto Repair Shop Serving Petaluma, CA
Petaluma residents seeking a trustworthy auto mechanic choose On Site Auto Repair for good reason. Since 2011, we've provided exceptional car repair services to drivers from Downtown Petaluma, the Adobe District, Oakhill-Brewster, and throughout the greater Petaluma area.
Our Santa Rosa shop is conveniently located via Highway 101, offering Petaluma customers access to the best auto repair shop in Sonoma County. Our ASE-certified team specializes in brake repair, engine repair, transmission repair, and radiator repair—all backed by honest diagnostics and fair pricing.
Is your check engine light on? We provide accurate check engine light repair using the latest diagnostic technology. We're also your local experts for import car repair, servicing Toyota, Honda, Lexus, Acura, Subaru, and Hyundai vehicles with precision. Domestic owners trust us for Ford repair, Chevy repair, and Dodge repair too.
From East Petaluma commuters to West Petaluma families, On Site Auto Repair treats every vehicle with the care it deserves. Experience the difference a family-owned auto repair shop makes.
Schedule your Petaluma car repair today: (707) 326-8655
About Petaluma, CA
Petaluma, CA blends preserved Victorian architecture with a riverfront downtown rooted in dairy and poultry farming heritage. Residents and businesses benefit from walkable streets, local manufacturing, and strong agricultural ties. Notable landmarks include Petaluma City Hall, Petaluma Adobe State Historic Park, Petaluma Valley Hospital, the Mystic Theatre, and Shollenberger Park. Technicians navigate Petaluma’s mix of downtown streets and rural routes, offering mobile diagnostics, brake and suspension work, and battery replacements near the Petaluma River, Sonoma-Marin Fairgrounds, and East Washington Street corridors. Service is scheduled around local traffic patterns and parking limitations, with parts sourced from nearby suppliers to keep repairs efficient for residents, commuters, and small fleets across West Side and Adobe Road areas.
Petaluma's population is 59,776. City center coordinates: 38.2324, -122.6367. The city has a Mediterranean climate with warm, dry summers, cool, wet winters, and coastal fog. On Site Auto Repair uses corrosion-resistant parts, battery and cooling system checks before heat waves, and rain-ready brake/tire services, while following California BAR standards, CARB parts requirements, and proper hazardous waste disposal rules. In West Petaluma, we handle brake and suspension issues near older homes; Oakhill sees quick diagnostics and tune-ups; McNear Landing gets battery and starter help; Mid-Town benefits from fluid services; and Waugh/Brown Valley receives scheduled maintenance and tire rotations. We prioritize eco-friendly practices, using recycled materials and sustainable methods whenever possible. Our team supports Petaluma’s community through local partnerships and donations that keep resources close to home. For reliable Auto Repair services in Petaluma, contact On Site Auto Repair today.
Cities We Serve
Clear Sky
Temperature
Wind Speed
Humidity
Things to Do
Petaluma Adobe State Historic Park
Shollenberger Park
Petaluma Historical Library & Museum
Helen Putnam Regional Park
Petaluma Wildlife Museum
Sonoma Portworks
The Petaluma Collective Militaria Mall
McNear Park
Walnut Park
Azari Vineyards
Keller Estate Winery
Parkwest Casino Sonoma
Lucchesi Park
Tolay Lake Regional Park
Arroyo Park
Transportation
Petaluma
Petaluma Blvd & Kent St
Petaluma Blvd N & Stony Point
Petaluma Blvd & Shasta Ln
Petaluma Transit
Copeland St
Petaluma Blvd S & G St
Petaluma Blvd S & Landing Way
Petaluma Blvd N At Shasta Ave/Sycamore
Petaluma Blvd N At Washington St NB
Petaluma Blvd & West St
Petaluma Blvd S At Mcnear Ave
McDowell Blvd & E Washington St
Petaluma Blvd S & Crystal Ln
Petaluma Blvd S & F St
Petaluma Blvd N At Oak St SB
Petaluma Blvd S At Mtn View Ave SB
Petaluma Blvd N At Gossage Ave Park
E Washington St at Vallejo St EB
4th & C Street
Driving Directions
Driving Directions from Northbay Automotive to On Site Auto Repair
Driving Directions from Petaluma Auto Repair to On Site Auto Repair
Driving Directions from Petaluma Auto Works to On Site Auto Repair
Driving Directions from Dave's Auto Repair to On Site Auto Repair
Driving Directions from Whole Auto Repair to On Site Auto Repair
Driving Directions from United Auto Repair & Tires to On Site Auto Repair
Driving Directions from Out West Garage to On Site Auto Repair
Driving Directions from Brodie's Tire & Automotive to On Site Auto Repair
Driving Directions from Empire Automotive to On Site Auto Repair
Driving Directions from Local Heroes Auto Service to On Site Auto Repair
Driving Directions from Sonoma Autowerks LLC to On Site Auto Repair
Driving Directions from Local Heroes Auto Repair to On Site Auto Repair
Driving Directions from Glenn's Auto & Truck Repair to On Site Auto Repair
Driving Directions from AAA Petaluma Auto & Tire Center to On Site Auto Repair
Driving Directions from Jay & Bill's Tire Service to On Site Auto Repair
Driving Directions from A&A Auto Repair to On Site Auto Repair
Driving Directions from Bill & Jays Auto Repair to On Site Auto Repair
Driving Directions from Petaluma Auto Craft to On Site Auto Repair
Driving Directions from Boulevard Automotive to On Site Auto Repair
Driving Directions from Yotaluma Automotive 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
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Decoding Toyota's Hybrid System: How It Works and Why It's Efficient
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10 Essential Maintenance Tips for Your Honda Accord
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Understanding the Chevy Silverado's 4WD System: Maintenance and Troubleshooting
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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.