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CSAI Auto Service
Top-notch AUTO
Services
Auto Electrical Services
Maintenance & Auto Service
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Star Smog Check Inspection
CARB Clean Truck Check
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We have two locations to serve you best
Expert Automotive Services
At CSAI Auto Service, we use the latest equipment to diagnose and repair your vehicle’s issues efficiently and effectively. We stand behind our work with a guarantee, so you can trust that your vehicle is in good hands.
Complete & Reliable automotive service & repair
CSAI Auto Service
What sets CSAI Auto Service apart from all of the others in Riverside, CA?
Quality Service
We use the latest diagnostic equipment and high-quality parts to ensure your vehicle is repaired to the highest standards.
Experienced and Certified Technicians
Our technicians are highly skilled and certified professionals with years of experience in the auto repair industry. They have the expertise to diagnose and repair any problem your vehicle may have.
Customer Satisfaction
Our goal is to exceed your expectations and ensure your complete satisfaction with every visit.
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Recently Serviced Vehicles
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2011 Scion xB
Mileage191,872Service Date3/4/2026Services Performed- Performed On Board Diagnosis (OBDII) Inspection, Visual Emission Control System Inspection and Visible Smoke Test Inspection. Also performed Malfunction Indicator Light Functional Test Test Result: Passed
Dawn D. gave our service a 5 star review on 3/4/2026 -
2015 Buick Enclave
Mileage224,809Service Date2/27/2026Services Performed- Lube Oil & Filter Service – complete Air Filter: good Cabin Air Filter: good Battery Service Type of Battery: N/A Battery Serial Number: N/A Battery Number or Size: N/A Clean Terminals: N/A Apply Corrosion Inhibitor: N/A Battery Test Results: N/A Starting System Test Results: N/A Charging System Test Results: N/A See attached Test Results. N/A Brake Inspection (Include Specs): Front Pads Spec (2mm), Actual Left (6mm) Right (6mm) Front Rotors Spec (1.080), Actual Left (1.090) Right (1.090) Rear Pads/Shoes Spec (2mm), Actual Left (8mm) Right (8mm) Rear Rotors/Drums Spec (.720), Actual Left (.730) Right (.730) Recommendations: Check All Fluid Levels (Include Fluid Level & Condition): Inspect Belts (Include Condition): good Inspect Hoses (Include Condition): good Wiper Blades: good Tire Rotation:front to rear Tire Measurements (32nds): Left Front (7), Right Front (7), Right Rear (6), Left Rear (6)
- HazMat EPA #CAL000339001
- Performed a visual Inspection and prepared an estimate for parts and labor.
- Checked Control Module for proper operation and fault codes if applicable: Checked cabin air filter condition: Checked drive belt condition: Checked A/C center vent temperature and ambient air temperature: Checked low and high pressure readings: Low pressure , High pressure Checked A/C compressor operation: good Checked A/C condensor fan operation: good Checked A/C evaporator inlet and outlet temperature difference: good Checked A/C Condensor inlet and outlet temperature difference: good Recover A/C system (amount recovered): .200kg Evacuate A/C system for 45 minutes. Recharge A/C system with R-134A refrigerant and added leak detection dye to the system. Run the A/C system to circulate the leak detection dye and check for leaks: Checked A/C system pressure after service: Low side pressure High side pressure Checked center vent temperature after service Recommendations: Found leak at ac compressor , recommend ac compressor , suction hose replacement and more 134a
Marcellus M. gave our service a 5 star review on 2/27/2026 -
2016 RAM 1500
Mileage153,972Service Date2/20/2026Services Performed- Diagnostic Steps; Step 1. Tried to start the vehicle. The vehicle would not start due to a dead battery. Step 2. Charged the battery and tried to start the vehicle. The vehicle started and is currently misfiring. The check engine light is intermittently flashing. Step 3. Scanned the vehicle for diagnostic trouble codes. Found powertrain control module codes P0158 (bank 2 sensor 2 oxygen sensor circuit high), P0138 (bank 1 sensor 2 circuit high), P0152 (bank 2 sensor 1 circuit high), P0132 (bank 1 sensor 1 circuit high), P1129 (closed loop fuel fueling not achieved – bank 2), P1128 (closed loop fueling not achieved – bank 1), P0300 (multiple cylinder misfires), and P0507 (idle speed performance higher than expected). Step 4. Using a scan tool checked misfire counters. Found cylinders 5, 4,6,7, and 8 have misfires. Cylinder 5 has the most. Step 5. Checked mechanical condition of the engine using a vacuum gauge. Verified there is a mechanical failure due vacuum gauge is bouncing indicating there is a failure in the valve train. Step 6. Checked compression on cylinders 4 and 5. Found compression is excessive (250 pounds per square inch and 245 pounds per square inch). Correction – Recommend removal of valve covers to check valve train.
- Removed valve covers, inspected valve train and found multiple broken valve springs causing misfires. Recommend remove cylinder heads and replace valve springs with valve seats as preventative repairs.
- Removed rocker assemblies from both cylinder heads to close valves. Performed cylinder leak test on all eight cylinders and found cylinders eight- bank 2 and seven- bank 1 wont hold pressure and leaking past intake valves, cylinder seven valve spring is visibly broken, cylinder eight spring appears ok. Removed all valve springs and seals on bank 1 including cylinder seven and all cylinders on bank 1 hold pressure and pass leak check. Removed and replaced cylinder eight intake valve spring and performed cylinder leak check and valve still leaking past intake valve. Recommend removing cylinder head and have cylinder eight intake valve with valve seats replaced for bank 2 cylinder head.
- Removed cylinder head to send for repair. Repaired cylinder head. Installed cylinder head with new gaskets. Test drove. Found that engine reaches normal operating temperature the vehicle runs rough and has set faults for the oxygen sensors. Recommend replacing 2 upstream and 2 down stream sensors. Replaced sensors. Vehicle now drives per design at operating temperature.
- Repaired cylinder head valves and valve seats.
- OXYGEN SENSOR – Remove & Replace – V8 Each
- OXYGEN SENSOR – Remove & Replace – V8 Each
- OXYGEN SENSOR – Remove & Replace – V8 Each
- OXYGEN SENSOR – Remove & Replace – V8 Each
Joe L. gave our service a 5 star review on 2/20/2026 -
2015 Audi A6 Quattro
Mileage27,555Service Date2/18/2026Services Performed- Performed On Board Diagnosis (OBDII) Inspection, Visual Emission Control System Inspection and Visible Smoke Test Inspection. Also performed Malfunction Indicator Light Functional Test Test Result: Pass
- Performed a visual Inspection and prepared an estimate for parts and labor.
Sandra G. gave our service a 5 star review on 2/19/2026 -
2014 Volkswagen Passat
Mileage186,152Service Date12/15/2025Services Performed- Diagnostic Steps; Step 1. Started vehicle and verified check engine light is on, performed code scan and found P0303 cylinder 3 misfire. No faults were found with transmission or traction control modules. Step 2. Removed spark plugs and found spark plugs extremely worn and oil fouled, also incorrect type has been installed. Spark plugs were recommended at 91,743 miles in 2020- see invoice 29354, only ignition coils were replaced. Step 3. Inspected vehicle and found oil low and past due for service, also engine air filter is extremely dirty. Correction – Recommend replacing spark plugs, perform induction service, replace air filter and recheck.
- Performed a visual Inspection and prepared an estimate for parts and labor.
- Removed and replaced spark plugs, moved cylinder 3 coil to cylinder 1, started vehicle and misfire still present. Performed code scan and found P0301 cylinder 1 misfire. Removed ignition coil and found insulation boot faulty. Removed and replaced ignition coil insulator boot, cleared fault codes, road tested vehicle and misfire no longer present.
- Drain and Refilled Engine Oil, Replaced Oil Filter, Checked all fluid levels, Checked Lights, Checked Belts, and Set Tire Pressure.
- HazMat EPA #CAL000339001
Jerica W. gave our service a 5 star review on 12/15/2025 -
2018 Kia Soul
Mileage189,684Service Date12/5/2025Services Performed- Diagnostic Steps; Step 1. Started vehicle and verified check engine light is on, vehicle runs rough and is smoking from tail pipe due to burning oil. Step 2. Inspected under hood and found engine oil below minimum level, crankcase ventilation valve appears to have been replaced. Step 3. Performed code scan and found P0300 multiple misfires detected P0302 misfire cylinder 2, P0304 misfire cylinder 4. Step 4. Removed spark plugs and found cylinder 2 spark plug end broken and missing. Step 5. Using bore scope inspected for broken piece of spark plug in cylinder 2 and found hole top of piston causing heavy oil smoke and misfire. Correction – Recommend replacing the engine. Customer declined repairs at this time.
- Performed a visual Inspection and prepared an estimate for parts and labor.
Tammy L. gave our service a 5 star review on 12/12/2025 -
2013 Nissan Maxima
Mileage167,174Service Date12/9/2025Services Performed- (continued from above) The vehicle would not crank. Customer was able to jump start the vehicle but it would only stay running with the jumper cables connected. The vehicle was towed in. Check and advise Diagnostic Steps; Step 1. Tried starting vehicle and found battery discharged and wont start. Hood wont stay open due to worn hood supports. Step 2. Jump started vehicle, vehicle starts and runs, no warning lights on at this time. After removing jump box vehicle turns off. Step 3. Charged battery, performed charging system test and found alternator not charging. Step 4. Inspected vehicle and found alternator appears to have been replaced, belt is worn and has multiple cracks. Correction – Recommend replacing alternator with belt. Recommend replacing hood supports
- Performed a visual Inspection and prepared an estimate for parts and labor.
- ALTERNATOR ASSEMBLY – Remove & Replace – [DOES NOT include Air Conditioning System recover, evacuate and recharge.] – [Includes: Test.]
- Recover A/C system (amount recovered: ). Evacuate A/C system for 45 minutes. Test for leaks prior to recharging system. Recharge A/C system with R-134A refrigerant. Add leak detection dye to the system. Run the A/C system to circulate the leak detection dye and check for leaks. Test system performance.
- HazMat EPA #CAL000339001
Sharon W. gave our service a 5 star review on 12/10/2025 -
2013 Chrysler 200
Mileage107,277Service Date12/1/2025Services Performed- Diagnostic Steps; Step 1. Started vehicle and verified check engine light is on, checked fault code and found P0340 cam position sensor 1 bank1 circuit fault. Step 2. Cleared fault and performed cam to crank position relearn and relearn failed and wont perform procedure due to circuit fault. Check engine light turned back on for P0340. Step 3. Inspected under hood and verified sensor had been replaced, wiring and connector appear ok. Step 4. Checked oil level and condition and found oil in safe range, service past due according to sticker. Correction – Recommend additional diagnostic time for cam position circuit fault.
Rhodell G. gave our service a 5 star review on 12/2/2025 -
2012 Mazda 5
Mileage111,351Service Date11/19/2025Services Performed- Performed On Board Diagnosis (OBDII) Inspection, Visual Emission Control System Inspection and Visible Smoke Test Inspection. Also performed Malfunction Indicator Light Functional Test Test Result: PASS
Nicolas V. gave our service a 5 star review on 11/20/2025 -
2007 Subaru Forester
Mileage173,333Service Date11/19/2025Services Performed- (continued from above) below threshold bank 1. Check and advise Diagnostic Steps; Step 1. Started the vehicle and verified the check engine light is on. Step 2. Scanned vehicle for diagnostic trouble codes. Verified trouble code P0420 (catalyst efficiency below threshold bank 1). Step 3. Checked for technical service bulletins. There are no bulletins for P0420 on this vehicle. Step 4. Performed diagnostic test per manufactures procedures as follows: Step 5. Checked exhaust system for leaks. There are no leaks currently present in the exhaust system. Step 6. Checked waveform data of air fuel lambda and rear oxygen sensor using a scan tool. Verified the rear oxygen sensor is switching excessively indicating a failed catalyst. Step 7. Checked air fuel sensor and oxygen sensor operation. Both sensors are operating as designed. Step 8. Checked fuel control system. Fuel control system is between +-10% (good). Correction – Recommend replacement of catalytic converter assembly and retest.
Frank S. gave our service a 5 star review on 11/19/2025 -
2014 Chevrolet Malibu
Mileage156,331Service Date11/5/2025Services Performed- Removed and replaced catalytic converter. Rechecked okay.
- Performed a visual Inspection and prepared an estimate for parts and labor.
Vanessa S. gave our service a 5 star review on 11/6/2025 -
2016 Ford F-350 Super Duty
Mileage98,004Service Date10/30/2025Services Performed- (Continued from above) The tank may be leaking. Check and advise Diagnostic Steps; Step 1. Started the vehicle. The check engine light is not currently on. Step 2. Scanned for diagnostic trouble codes. There are no codes present. Step 3. Racked and raised the vehicle to visually inspect the diesel exhaust fluid (DEF) tank. Found there are signs of major DEF fluid leakage. Step 4. Correction – Recommend removal of DEF tank to further isolate the source of the leakage.
- Performed a visual Inspection and prepared an estimate for parts and labor.
- Removed tank to inspect for the source of the leak. Found the DEF Injector pump assembly is leaking.
Karen D. gave our service a 5 star review on 10/30/2025
BG Products
We have two Locations to serve you best
CSAI Auto Repair Center
Hours
Mon-Fri : 8am-5pmSat-Sun : Closed
Address
CSAI Auto Service
3001 Chicago Ave
Riverside, CA 92507
CSAI Smog Check Center
Hours
Mon-Fri: 8am-5pmSaturday: 9am-2pm
Sunday: Closed
Address
CSAI Smog Check Center
6589 Magnolia Ave
Riverside, CA 92506
