
Auto Repair & Performance in San Marcos
From routine maintenance and diagnostics to repairs and select performance upgrades, HG Performance works on all makes and models. Visit our San Marcos shop for service backed by decades of automotive experience.
- 4.9 ★★★★★ · Over 245 Google Reviews
- Master ASE Certified
- All Makes & Models — Fiat to Ferrari
- San Marcos, CA
CHOOSE YOUR AUTOMOTIVE SOLUTION
How Can We Help You Today?
Whether you need routine maintenance, diagnostics, repairs, or performance upgrades, HG Performance services European, Asian, American, and exotic cars and SUVs in San Marcos. Contact us to discuss your vehicle and the work you need.
Looking to unlock your vehicle’s full potential? From ECU tuning and performance upgrades to wheels and suspension enhancements, HG Performance delivers precision-engineered solutions tailored to your driving goals.
Heinz Gietz has been in operation since 1969. HG Performance has served customers at its Pawnee Street location in San Marcos since 2018. Our in-house team provides maintenance, diagnostics, repairs, and performance upgrades for European, Asian, American, and exotic cars and SUVs. We work on all makes and models, from Fiat to Ferrari and beyond.
ABOUT HG PERFORMANCE
Auto Repair & Performance for All Makes and Models
Heinz Gietz has been in operation since 1969. HG Performance has served customers at its Pawnee Street location in San Marcos since 2018. With more than 25 years of in-house automotive experience, our team provides maintenance, diagnostics, repairs, and performance upgrades for European, Asian, American, and exotic cars and SUVs. We work on all makes and models, from Fiat to Ferrari and beyond.

Master ASE Certified

Mechanical & Electrical
Diagnostics

All Makes & Models

In Business
Since 1969

- Ferrari
- Lamborghini
- McLaren
- Porsche
- Mercedes-Benz
- BMW
- Audi
- Volkswagen
- Range Rover
- Alfa Romeo
- Fiat
- Mitsubishi
- Subaru
- Toyota
- Tesla
- Ford
- Chevrolet
- Dodge
- + More
PERFORMANCE HERITAGE
North County San Diego
Performance
HG Performance offers carefully selected performance upgrades for drivers in North County San Diego. Whether you’re interested in ECU tuning, wheels, suspension, or another upgrade for your vehicle, our team can help you explore the options we offer. Contact us to discuss your car and what you have in mind.
Auto Repair in San Marcos
for All Makes and Models
HG Performance provides maintenance, diagnostics, and repairs for European, Asian, American, and exotic cars and SUVs. Whether your vehicle is due for routine service or needs a specific repair, contact our San Marcos team to discuss the work you need.

Maintenance & Brakes
Oil and fluid services, brake pads and rotors, tires, and scheduled maintenance.

WHY CHOOSE HG PERFORMANCE
Delivering maintenance, diagnostics, repairs, and select performance upgrades for all makes and models, from European sports cars to Asian and American vehicles.

Expert
Automotive Service

Peak
Performance

Trusted
Service

Expert
Technicians
FEATURED BUILDS
Featured Work
Blue Label Auto – Black Ferrari FF
BMW E36 M3 with HG Design Full Roll Cage
Droptop Dropped on HRE’S – Ferrari 458 Spider By HG Performance
Hurricane Season – Lamborghini Huracan | HRE Wheels
Ready to Transform Your Vehicle?
Whether you’re considering suspension upgrades, ECU tuning, or routine maintenance, our experienced team is ready to help with the same attention to detail we bring to every vehicle.
WHAT OUR CUSTOMERS SAY
Performance. Reliability. Results.
Posted on Google![]()
DerrickTrustindex verifies that the original source of the review is Google.
They are experts across all exotic makes. They provide excellent service and communication throughout their service.Posted on Google![]()
DC1Trustindex verifies that the original source of the review is Google.
Thanks guys. You guys always get it right.Posted on Google![]()
Jeff SummerhaysTrustindex verifies that the original source of the review is Google.
Love this place. Sorry you moved so far north.Posted on Google![]()
Tracy S.Trustindex verifies that the original source of the review is Google.
I initially chose HG Performance upon seeing what other happy customers had to say. I had HG Performance install my CF side skirts and front splitter. Eddie has gone above and beyond in communicating, educating, and making sure you are more than satisfied with their service. In fact, the reason I ended up making the appt. was because of Eddie. Installation was completed in 4 hrs and the pricing was very reasonable. I highly recommend HG Performance for any of your service needs. You won't be disappointed! Thank you to your TEAM for giving my car the final touches! I love the way they look!Posted on Google![]()
Ryan WheelerTrustindex verifies that the original source of the review is Google.
Had them do a PPI, pre purchase vehicle inspection. I must say, we were beyond impressed, they were very thorough and took their time, gave us a lot of confidence purchasing the vehicle. Ask for Eddie, hes the man!Posted on Google![]()
Alex STrustindex verifies that the original source of the review is Google.
I can’t say enough great things about HG Performance. They have worked on my M4 and every single experience has been outstanding. From the quality of the work to the professionalism of the team, they truly operate at a different level. The car runs absolutely incredible, and you can immediately tell they know these platforms inside and out. The attention to detail, precision in their work, and commitment to doing things the right way really stand out. They don’t cut corners, and it shows in both performance and reliability. A huge shoutout to Omar, the owner, who is hands down one of the most knowledgeable and genuine people in the industry. He takes the time to explain everything clearly, answers questions thoroughly, and makes sure you feel confident about the work being done. You can tell he genuinely cares about his customers and their cars. That level of involvement and passion is rare. If you’re looking for a shop you can truly trust with your M4 or any performance build, HG Performance is the place to go. The results speak for themselves, and I wouldn’t take my car anywhere else. Highly recommend. Thank you Omar!!!Posted on Google![]()
Jesse LyonTrustindex verifies that the original source of the review is Google.
Flawless install of Stage 1 Mountain Pass sport coilover kit and rear camber arm on my Tesla Model 3. Quick install and street alignment got me set up for some canyon drives. They are real pros who usually work on high end european/track cars, but are also the top Tesla suspension garage in north county. Thanks!Posted on Google![]()
Chris DewarTrustindex verifies that the original source of the review is Google.
Always top notch works from Omar and the guys! Just had them install a Sharkwerks exhaust on my 992.2 GT3 and they did a fantastic job!Posted on Google![]()
Josh LopezTrustindex verifies that the original source of the review is Google.
Anthony and the team at HG has been amazing to work with and they were very helpful. I enjoyed my experience with HG. They performed a series of upgrades and maintenance on my X3M and I am very stoked on how the car is performing.Posted on Google![]()
Richard “Rick” ClaudeTrustindex verifies that the original source of the review is Google.
Outstanding work on my MB. Replaced oil pump and ancillary parts. Did alignment and rides a lot smoother. Thanks and a shout out to Devin on customer service for his support.
Frequently Asked Questions
We work on cars and SUVs of all makes and models, from Fiat to Ferrari. That includes European, Asian, American, and exotic vehicles. Available repairs, maintenance, and performance upgrades depend on the specific vehicle and the work requested.
HG Performance offers mechanical and electrical diagnostics, including check engine light concerns. A warning light can have different causes, so the light or a fault code alone does not establish which repair is needed. Contact us with your vehicle details and a description of what you have noticed.
Oil can leak from different parts of an engine, and the source needs to be identified before recommending a repair. HG Performance repairs engine oil leaks and performs valve cover gasket replacements. Tell us where you have noticed oil or any change in oil level when you contact us.
Yes, we offer mechanical diagnostics for overheating and coolant loss. Possible causes vary by vehicle; a symptom alone does not confirm a failed head gasket or any other specific part. HG Performance performs water pump replacements, and the appropriate repair depends on what is found with your vehicle.
Our services include engine and drivetrain oil services, brake pad and rotor service, wheel alignments, and tire mounting and balancing. We also offer manual transmission drain and fill services. Tell us your vehicle’s year, make, model, and the service you need so we can discuss its applicable options.
Yes. HG Performance offers pre-purchase inspections for cars and SUVs of all makes and models. Contact us before you buy with the vehicle details and your timing to ask about an appointment. The inspection scope depends on the vehicle and the service arranged.
We offer select suspension, wheel, tire, and brake upgrades for eligible vehicles. We also install Stage 1 CARB EO-approved ECU tunes where an approved option is available for the specific vehicle. We do not offer custom ECU tuning; upgrade availability varies by vehicle.
We can consider general maintenance requests for Tesla and other electric vehicles, including tires, brakes, alignments, and suspension work. The work we accept depends on the vehicle and service requested. We do not perform high-voltage maintenance or repairs.














