Full A/C System Overhaul
We evacuate the old refrigerant, replace the compressor and condenser if leaking, install a new orifice tube and accumulator, and recharge to factory specs. Takes about four hours.
Service area
Advanced Auto Mobile Mechanic in San Marcos
As our home base, we serve San Marcos residents and businesses daily. Whether you're near Texas State University or out in the country, we'll come to you for diagnostics, brake work, A/C repair, and more.
Local service
Proudly serving San Marcos
San Marcos sits on the Balcones Fault line, where the Edwards Plateau meets the Blackland Prairie. That means clay soils that shift with the seasons, and a mix of older homes near the square and newer subdivisions spreading out toward the Blanco River. The heat and humidity of Central Texas put a strain on engines, especially A/C systems and batteries, and the limestone dust from nearby construction sites can clog filters and belts. Whether you're in a 1980s ranch house off Ranch Road 12 or a townhouse near Texas State, the cars here need regular attention to keep up with the stop-and-go of campus traffic and the long hauls out to the country.
We roll up in a fully stocked service van, ready to handle diagnostics, brake jobs, and A/C work right in your driveway or parking lot. Because we're based in San Marcos, we can be at your place within the same day for most calls. We set up a clean work zone with mats and covers, and we always top off fluids and check for other issues before we leave. Being local means we know the roads—like the potholes on Hopkins Street and the gravel driveways out on Lime Kiln Road—and we adjust our approach so nothing gets in the way of a solid repair.
Advanced Auto Mobile Mechanic works across San Marcos, TX & the surrounding Hays County area, so a crew is never far from San Marcos. Call (512) 618-8875 or request a free estimate and we’ll come out and take a look.
Local demand
What San Marcos homeowners call us for
Engine Diagnostics
Clay soil and limestone dust can foul sensors and wiring. We run a full scan on your car's computer, then check for the specific issues that San Marcos's heat and terrain cause.
A/C Repair & Recharge
With summer temps often above 95°F, a working A/C is a must. We test for leaks in the condenser and compressor, then recharge with the correct refrigerant for your make.
Brake Inspection & Repair
Stop-and-go traffic around Texas State and the square wears pads and rotors fast. We measure thickness, check for warping, and replace components as needed to keep you safe.
Battery, Starter & Alternator Service
Heat under the hood here shortens battery life. We load-test the battery, check the alternator output, and clean corrosion off terminals to prevent no-start mornings.
Typical projects
The kind of work we take on in San Marcos
Brake Pad and Rotor Replacement
We remove the wheels, compress the calipers, replace pads and rotors, and bleed the system if needed. We test for pedal feel and noise before wrapping up.
Engine Diagnostic and Sensor Swap
We scan the computer for trouble codes, then test the suspect sensor with a multimeter. If it's a faulty oxygen or mass airflow sensor, we replace it and clear the code.
What we do here
Every service, available in San Marcos
Where we work
Across San Marcos
Texas State & Surrounding Streets
Student apartments and older homes near the university have tight parking and frequent calls for battery jumps and A/C issues. We work around class schedules and can often squeeze in a same-day visit.
Outlying Properties on Lime Kiln Road
Gravel drives and longer distances mean more dust in the engine bay and more strain on belts. We bring extra filters and hoses, and we coordinate with homeowners who have limited time.
Kyle & Buda Corridor
Though technically separate towns, we regularly serve the stretch along I-35 where new subdivisions are going up. These newer homes have garages, so we can do brake and belt work out of the weather.
Before work starts
Permits & local rules in San Marcos
Homeowner's Responsibility
No permits are needed for mobile car repairs on private property in San Marcos. However, if you live in a homeowners' association neighborhood, check your CC&Rs for any rules about working on vehicles in the driveway.
Environmental Rules
We handle all fluids—oil, coolant, refrigerant—according to state and local environmental guidelines. We haul away used parts and fluids for proper disposal; you don't need to arrange anything.
Questions
San Marcos questions, answered
Reviews
What San Marcos homeowners say
4.8 average from 137 Google reviews
“I can’t say enough good things about Cliff! My daughter’s Mini Cooper developed a problem, and anyone who knows Minis knows they can be challenging to diagnose and work on. Cliff was able to quickly troubleshoot the issue, accurately diagnose the problem, and get it repaired much faster than I expected.”
Nathan Sartorius
Google Review
“Cliff was the most helpful auto mechanic I've ever worked with. After getting a quote at another mechanic in San Marcos at $2700, I wanted a second opinion. Cliff picked up the phone at 8 pm and instantly was helpful. He worked to get me the absolute best prices for the part that was needed.”
Leah Cornelius
Google Review
“I was looking for a mechanic who could check my AC, no cool air. Cliff was able to quickly diagnose the issue and make repair. I felt he spent time to make sure he wasn't just slapping a band-aid repair on the problem. Communication was great. He'll be our go to in San Marcos.”
Matt Baer
Google Review
“Clif was great to work with. I broke down far from my house because my serpentine failed. He answered right away with very reasonable quotes compared to the shops in the area and came and fixed my truck within 35 minutes I was back running.”
Short Stack
Google Review
“Son had vehicle issues and Cliff property went to his aide and resolved the issue in a timely manner and at a very fair price. Very reassuring for a Colorado parent with a student in Texas.”
Kenneth Ybarra
Google Review
“I can’t say enough good things about Cliff! My daughter’s Mini Cooper developed a problem, and anyone who knows Minis knows they can be challenging to diagnose and work on. Cliff was able to quickly troubleshoot the issue, accurately diagnose the problem, and get it repaired much faster than I expected.”
Nathan Sartorius
Google Review
“Cliff was the most helpful auto mechanic I've ever worked with. After getting a quote at another mechanic in San Marcos at $2700, I wanted a second opinion. Cliff picked up the phone at 8 pm and instantly was helpful. He worked to get me the absolute best prices for the part that was needed.”
Leah Cornelius
Google Review
“I was looking for a mechanic who could check my AC, no cool air. Cliff was able to quickly diagnose the issue and make repair. I felt he spent time to make sure he wasn't just slapping a band-aid repair on the problem. Communication was great. He'll be our go to in San Marcos.”
Matt Baer
Google Review
“Clif was great to work with. I broke down far from my house because my serpentine failed. He answered right away with very reasonable quotes compared to the shops in the area and came and fixed my truck within 35 minutes I was back running.”
Short Stack
Google Review
“Son had vehicle issues and Cliff property went to his aide and resolved the issue in a timely manner and at a very fair price. Very reassuring for a Colorado parent with a student in Texas.”
Kenneth Ybarra
Google Review
Get a Free Estimate
Call or text us to describe your issue, and we'll schedule a time to come out. We'll diagnose the problem, give you a written estimate, and get you back on the road.