Auto Electrical
Heinz Gietz Autohaus provides the best electrical auto service in San Marcos, hands down.
Heating & Air Conditioner Repair
For the best cooling and heating auto repair service in San Marcos, trust Heinz Gietz Autohaus.
Engine Auto Service
When that check engine light comes on, it’s hard not to feel annoyed or even worried.
Maintenance & Auto Service
It’s a fact: regular, quality maintenance extends the life of your vehicle. It also gives you the peace of mind you need.
Exhaust Service
If you’re concerned about passing emissions or you already know your exhaust system isn’t what it should be, visit Heinz Gietz Autohaus in San Marcos.
The Absolute Best Car Service in San Marcos, CA
Heinz Gietz Autohaus
What sets Heinz Gietz Autohaus apart from all of the others in San Marcos, 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.
Our Customer Reviews
Recently Serviced Vehicles
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2022 Mercedes-Benz GT 53 AMG
Mileage30,480Service Date9/4/2026Services Performed- Performed installation of renntech power module, partially removed ecu, air box for access installed module and harness. Assembled vehicle accordingly, tested operation. Test drove vehicle, vehicle operating as designed. ( To use bypass plug, unplug module at harness install plug and the vehicle is reverted to stock configuration. Open hood close driver door don't leave key in the vehicle make sure ignition is off lock the vehicle make sure all light on dash are off and perform module removal as listed above.)
- Performed installation of renntech exhaust valve controller. Removed luggage compartment trim, and battery for access. Assembled vehicle accordingly, tested operation, test drove vehicle. Vehicle operating as designed. (On key fob position 1is valves open position 2 is valves closed.)
- – Set the tire pressure to manufacturer specifications. – If the wheels were removed for any repairs this visit, the wheels lug nuts/bolts were torqued down to manufacturer's specifications. *****An **N/A** wheel torque value is filled in above when the wheels were not removed during this visit. *****
Anthony L. gave our service a 5 star review on 9/4/2026 -
2024 Porsche 911
Mileage2,924Service Date8/28/2026Services Performed- – Removed and replaced the exhaust system. Installed the valve actuator cooling guides. Checked for leaks, no leaks detected at this time. Checked for faults, no faults currently. TECHNICIAN NOTE: 1) If any warnings or faults populate for the valve actuator, the vehicle needs to be adapted for the new valves at a dealership or independent with a security gateway enabled PIWIS. 2) If any warnings or faults populate for catalyst efficiency, the vehicle will need updated software in order to eliminate the warnings.
- – Removed and replaced the front side markers and aero piece behind the wheel for a new side marker. Rewired and extended the original side markers wiring to reach the location of the new side markers.
- – Set the tire pressure to manufacturer specifications. – If the wheels were removed for any repairs this visit, the wheels lug nuts/bolts were torqued down to manufacturer's specifications. *****An **N/A** wheel torque value is filled in above when the wheels were not removed during this visit. *****
Steve T. gave our service a 5 star review on 8/29/2026 -
2018 Porsche Macan
Mileage108,370Service Date8/26/2026Services Performed- – oil leaking from timing chain tensioner down side of passenger side by alternator. – oil leaking from oil cooler/lower oil pan forward of timing chain tensioner.
- – coolant leak from coolant coupler forward of engine V. – coolant leaking from small equalizer hoses on top of radiator that goes to turbo coolers on the sides of bumper. – coolant leaking from coolant distributor on side of drivers side air box.
- Inspected front brake pads and rotors found rotors okay. Front pad at 4mm, Replaced front brake pads
- Found rear brake pads and rotors at min thickness. Replaced rear brake pads and rotors.
- – Set the tire pressure to manufacturer specifications. – If the wheels were removed for any repairs this visit, the wheels lug nuts/bolts were torqued down to manufacturer's specifications. *****An **N/A** wheel torque value is filled in above when the wheels were not removed during this visit. *****
Amber C. gave our service a 5 star review on 8/26/2026 -
2011 Porsche Cayman
Mileage55,361Service Date7/28/2026Services Performed- – Performed PPI inspection. Refer to the attached inspection PPI notes for more information.
- – Performed over rev report. Refer to the PPI inspection notes for more information.
- Tire Pressures: Front: 33 psi Rear: 34 psi Wheel Torque (If wheels were removed): NA ft lbs
Cary I. gave our service a 5 star review on 8/22/2026 -
2012 Mercedes-Benz CL65
Mileage83,226Service Date8/21/2026Services Performed- Found the front right shweel speed sensor not reading.
- – Performed engine oil service and full vehicle inspection. Refer to the inspection report for more information.
- Replaced wiper blades.
- Flushed brake fluid
- Replaced wheel speed sensor, cleared codes. Confirmed function.
- Replaced hood grill trim. Completed
- Tire Pressures: Front: 38 psi Rear: 38 psi Wheel Torque (If wheels were removed): 110 ft lbs
Adam P. gave our service a 5 star review on 8/21/2026 -
2025 Tesla Model Y
Mileage23,774Service Date8/17/2026Services Performed- Road test vehicle. Check all suspension and steering parts for wear. Check tire pressure and condition. Check caster and camber angles and adjust as required. Check and set toe-in as required. Center steering wheel.
- – Set the tire pressure to manufacturer specifications. – If the wheels were removed for any repairs this visit, the wheels lug nuts/bolts were torqued down to manufacturer's specifications. *****An **N/A** wheel torque value is filled in above when the wheels were not removed during this visit. *****
Harold H. gave our service a 5 star review on 8/19/2026 -
2013 Mercedes-Benz E550
Mileage128,771Service Date8/13/2026Services Performed- – Performed engine oil service and full vehicle inspection. Refer to the inspection report for more information.
- Performed replacment of front brake pads rotors and sensor, performed brake bed in procedure. Vehicle operating as designed.
- Tire Pressures: Front: 36 psi Rear: 36 psi Wheel Torque (If wheels were removed): 100 ft lbs
Daniel K. gave our service a 5 star review on 8/15/2026 -
2013 Mercedes-Benz GLK350
Mileage184,049Service Date8/10/2026Services Performed- – Performed diagnosis: Scanned for fault codes from the vehicle and found P2279 for a leak detected in the intake air system. Performed a visual inspection of a vehicle and found that the front main seal is making a loud squeaking sound while a vehicle is idling as it warms up. When the oil cap is removed from the engine the sound goes away and the oil cap is also being held down by a large amount of vacuum. Do not recommend driving the vehicle until this issue is fixed as it will cause the front and rear main seals to fail which will lead to other repairs. \ Recommend replacement PCV / centrifuge cover. Will need seals for the high pressure fuel pump system as well. Due to the mileage on the vehicle there is a chance that other components might break while a vehicle's being disassembled to remove the intake manifold to get to the PCV valve.
- – Removed and replaced the air oil separator / centrifuge cover. Verified failure in the centrifuge cover, there is a tear in the diaphragm. Performed a vehicle test drive and further diagnosis. The vehicle is no longer emitting the high pitch squeal sound from the front main seal, hot or cold. Cleared default codes prior to performing test drive and performed a vehicle false scan after, no codes detected at this time.
- – Set the tire pressure to manufacturer specifications. – If the wheels were removed for any repairs this visit, the wheels lug nuts/bolts were torqued down to manufacturer's specifications. *****An **N/A** wheel torque value is filled in above when the wheels were not removed during this visit. *****
Franz E. gave our service a 5 star review on 8/13/2026 -
2013 Land Rover Range Rover Sport
Mileage132,765Service Date8/7/2026Services Performed- Replaced front brake pads and rotors with customer supplied parts. Test drove vehicle to bed in brake pads. Completed.
- Performed brake fluid flush. Completed.
- – Set the tire pressure to manufacturer specifications. – If the wheels were removed for any repairs this visit, the wheels lug nuts/bolts were torqued down to manufacturer's specifications. *****An **N/A** wheel torque value is filled in above when the wheels were not removed during this visit. *****
Imran Z. gave our service a 5 star review on 8/7/2026 -
2015 MINI Cooper
Mileage63,709Service Date8/5/2026Services Performed- Performed coolant pressure test and found oil filter housing leaking coolant. Recommend replacing oil filter housing.
- – Set the tire pressure to manufacturer specifications. – If the wheels were removed for any repairs this visit, the wheels lug nuts/bolts were torqued down to manufacturer's specifications. *****An **N/A** wheel torque value is filled in above when the wheels were not removed during this visit. *****
Dennis A. gave our service a 5 star review on 8/6/2026 -
2021 Mercedes-Benz GLS450
Mileage115,753Service Date8/5/2026Services Performed- Removed axles, exhaust and differential. Replaced differential and reinstalled axles and exhaust. Confirmed differential came pre filled with fluid.
- Road test vehicle. Check all suspension and steering parts for wear. Check tire pressure and condition. Check alignment of all four wheels. Adjust caster, camber, toe-in, and thrust angle as needed on all four wheels. Center steering wheel.
- – Set the tire pressure to manufacturer specifications. – If the wheels were removed for any repairs this visit, the wheels lug nuts/bolts were torqued down to manufacturer's specifications. *****An **N/A** wheel torque value is filled in above when the wheels were not removed during this visit. *****
Jacob S. gave our service a 5 star review on 8/5/2026 -
2016 BMW 340i
Mileage35,479Service Date7/30/2026Services Performed- Ziptied cable out of the way of driveshaft.
- Rotated front to back.
- Removed factory struts. Installed st coilovers. Front and rear dampening 8 clicks from full stiff. Aligned to daily driver specs.
- – Set the tire pressure to manufacturer specifications. – If the wheels were removed for any repairs this visit, the wheels lug nuts/bolts were torqued down to manufacturer's specifications. *****An **N/A** wheel torque value is filled in above when the wheels were not removed during this visit. *****
Alex V. gave our service a 5 star review on 7/31/2026
Contact Us Today for an Auto Repair Estimate
Our friendly and knowledgeable staff is always happy to answer any questions you may have and will keep you informed throughout the entire repair process. So why pick us for all your San Marcos auto repair needs? The answer is simple: expertise, customer service, affordability, convenience, and quality. Contact us today to schedule your appointment and experience the difference for yourself.
Hours
Mon-Fri : 8am-5pmSat-Sun : Closed
Address
Heinz Gietz Autohaus
182 Pawnee St
San Marcos, CA 92078
