What Our Customers Say
Welcome to Castro Valley Union 76,
your car service in Castro Valley, CA!
If you’re looking for auto repair in Castro Valley, CA, you’ve found us. Here at Castro Valley Union 76 we work hard to earn your trust and loyalty. We know how important it is to find a Castro Valley car service you can rely on, so your satisfaction is our top priority each and every day.
Here at Castro Valley Union 76 we understand what makes customer service truly outstanding. You will feel the difference exceptional customer care makes when you work with us. We know auto repair in Castro Valley offers you lots of choices, and we aim to provide the kind of caring customer service that will bring you back.
Our professional automotive service offers you years of combined expertise from our well-trained technicians. We treat our auto repair professionals well because we value their skill and can-do attitude. We know our team sets us apart, saving you time and money, not to mention worry. When it comes to auto repair in Castro Valley, we are totally confident that Castro Valley Union 76 is the best option in town!
Address
Castro Valley Union 76
2445 Castro Valley Blvd
Castro Valley, CA 94546-5119
(510) 581-6700
Shop Hours
Mon-Fri : 7:30am-5:30pm
Saturday : 7:30am-2pm
Sunday : Closed
Directions
Payment Types








About Castro Valley Union 76 Castro Valley, CA
Since 1984 Castro Valley Union 76 has been there for the people of Castro Valley, CA. We love what we do, and that basic fact fuels our business. We are dedicated to our customers, and that’s why they stick with us—the best auto repair Castro Valley has to offer.
Our family of technicians and service staff sees their work here at Castro Valley Union 76 as more than a job. It’s their vocation and livelihood. Each member of our team is invested in your satisfaction.
Castro Valley Union 76 was founded on the basic idea that everyone deserves respect. It is our mission to treat each person that comes through our door with dignity and sensitivity. We believe this attention to detail has paid off by providing us with our loyal, friendly family of customers. That’s what makes Castro Valley Union 76 the best car service in Castro Valley, CA!
Are you ready to experience the best Castro Valley, CA car service available? Please give us a call or make an appointment here.
The Absolute Best Car Service in Castro Valley, CA
What sets Castro Valley Union 76 apart from all of the others in Castro Valley, CA?
Trust: When it comes to auto repair in Castro Valley, it’s all about earning loyalty and trust by doing our very best every day. We are determined to earn and keep your trust.
Talent: At Castro Valley Union 76, you can rest easy knowing that our highly-skilled, experienced auto service professionals are handling your car. Our technicians bring years of experience, skill, and education to the Castro Valley auto repair table.
Time: We take the time we need to provide you with top quality car service in Castro Valley, and we take the time to talk to you about what that means. We listen to you so we understand your needs and goals for your auto repair.
Recently Serviced Vehicles
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2009 Chevrolet Impala
Mileage129,087Service Date5/7/2026Services Performed- Transmission fluid leaking from transmission cooler lines going from Transmission to external cooler in front of the radiator. Someone cut the plastic under cover to get access to transmission cooler hose, replaced part of the hoses with temp hose and clamps. Need to remove both lines and install new lines add fluid and recheck for leaks.
- TRANSAXLE OIL COOLER PIPES – Remove & Replace – One
- Found code P0976 2-3 shift solenoid circuit low voltage. Clear code after transmission fluid repair and codes comes on right away when starting vehicle. Found 12 volts with key on from transmission control module to 2-3 shift solenoid in transmission. When activating 2-3 solenoid with scan tool, voltage should drop to 0 since tcm is providing ground to 2-3 shift solenoid in transmission. Power is okay from tcm fuse on right side fuse box. When activating 2-3 solenoid, yellow black wire from tcm to transmission stays at 12 volts. TCM not sending ground signal to 2-3 solenoid in transmission. Recommend remove and replace TCM with oem GM unit, and program to vehicle with GM sp2 software.
- TRANSAXLE CONTROL MODULE – Remove & Replace – [Includes: Programming.]
- Program TCM with GM SP2 software
ELLEN K. gave our service a 5 star review on 5/9/2026 -
2013 Ford Mustang
Mileage70,268Service Date5/6/2026Services Performed- Haz disposal fee
- Lubricate and check chassis. Change oil and oil filter. Check air filter and breather filter. Check all fluid levels and tire pressures. Preform basic safety inspection. Road test vehicle.
TOM F. gave our service a 5 star review on 5/6/2026 -
2017 Toyota RAV4
Mileage81,988Service Date5/2/2026Services Performed- Haz disposal fee
- Lubricate and check chassis. Change oil and oil filter. Check air filter and breather filter. Check all fluid levels and tire pressures. Preform basic safety inspection. Road test vehicle.
JAMES M. gave our service a 5 star review on 5/2/2026 -
2006 Toyota Tacoma
Mileage243,889Service Date5/1/2026Services Performed- DIFFERENTIAL FLUID – Drain & Refill – Rear Axle
- EXTENSION HOUSING OIL SEAL – Remove & Replace
JOHN F. gave our service a 5 star review on 5/2/2026 -
2006 Saturn Ion Red Line
Mileage196,735Service Date4/29/2026Services Performed- Haz disposal fee
- Lubricate and check chassis. Change oil and oil filter. Check air filter and breather filter. Check all fluid levels and tire pressures. Preform basic safety inspection. Road test vehicle.
- A/C COMPRESSOR – Remove & Replace
- CONDENSER – Remove & Replace – [DOES NOT include Air Conditioning System recover, evacuate and/or recharge.]
- EVAPORATOR EXPANSION VALVE – Remove & Replace
- Air conditioning service
- Check for sometimes not cranking when starting, adjust the clutch pedal switch, still the same problem, found ignition switch if you back off a little bit, vehicle starts, recommend replacing ignition electric switch and than programming the switch.
BRIAN E. gave our service a 5 star review on 5/1/2026 -
2010 Ford Flex
Mileage129,717Service Date4/17/2026Services Performed- Smog inspection and certificate if passes
TONI W. gave our service a 5 star review on 4/17/2026 -
2025 Chevrolet Trax
Mileage12,628Service Date4/14/2026Services Performed- Haz disposal fee
- Lubricate and check chassis. Change oil and oil filter. Check air filter and breather filter. Check all fluid levels and tire pressures. Preform basic safety inspection. Road test vehicle.
JULIE M. gave our service a 5 star review on 4/14/2026 -
2025 Nissan Altima
Mileage2,605Service Date3/27/2026Services Performed- Mount and balance one new tire
- California disposal fee
- Federal disposal fee
JORDAN T. gave our service a 5 star review on 4/7/2026 -
2015 Ford F-150
Mileage96,070Service Date3/27/2026Services Performed- Found vehicle one gallon low on coolant causing 2 speed fan to run on high and make more noise than usual low speed. Pressure check cooling system and found coolant leak from water pump and from turbo line connectors on driver side turbo. Recommend remove and replace water pump, thermostat due to age, turbo line with all 4 connectors for return line and delivery line to turbo, replace valve cover gasket leaking engine oil at same time, add coolant, road test the vehicle.
- WATER PUMP – Remove & Replace – 3.5L Eng, Twin Turbocharger
- THERMOSTAT HOUSING &/OR OUTLET – Remove & Replace – 3.5L Eng, Twin Turbocharger Housing
- TURBOCHARGER COOLANT DELIVERY PIPE – Remove & Replace – 3.5L Eng, Twin Turbocharger Left – [Includes: R&I Turbocharger.]
WENDELL H. gave our service a 5 star review on 4/3/2026 -
2012 Volkswagen CC
Mileage147,519Service Date3/23/2026Services Performed- Cylinder misfire code P0304 misfire #4 cylinder, remove spark plugs from 1 2 and 4 cylinder, #3 plug is frozen, compression in #4 cylinder is 0 compression in #1 is 130 psi and #2 is 90 psi, recommend removing head for inspection to further estimate for repairs needed. Also $4 spark plug is black, fuel fouled.
ROBERT S. gave our service a 5 star review on 3/30/2026 -
2011 Honda CR-V
Mileage157,303Service Date3/25/2026Services Performed- Haz disposal fee
- Lubricate and check chassis. Change oil and oil filter. Check air filter and breather filter. Check all fluid levels and tire pressures. Preform basic safety inspection. Road test vehicle.
JANIS F. gave our service a 5 star review on 3/25/2026









