At A+ Smog and Muffler Complete Auto Repair, we specialize in performance. Whether you want to get the best mileage out of your car or want to get your project car at its best, we can do it all.


At A+ Smog and Muffler Complete Auto Repair, we are dedicated to providing the best quality of auto repair service. Our services include complete smog check, muffler, engine, transmission, air conditioning, electrical, alignment, and performance. We service all of San Bernardino and surrounding areas.

Case Studies

2006 Cadillac XLR

Check engine light was on.

  • A Plus Smog and Muffler 2006 CADILLAC XLR auto-cadillac-xlr-2006.png2006 Cadillac XLR

    Customer complaint was check engine light was on.

    Customer would like to have vehicle checked out and repaired.

    Technician retrieved codes with scan tool and after researching found technical service bulletin from GM for an update to Powertrain control module that was specific to solving the problem this vehicle was experiencing. Technician proceeded to reprogram powertrain control module with updated software downloaded from General Motors website using Tech 2 GM factory scan tool. This was the repair for this vehicle.