Performance Auto Repair & Smog on Main Street in Chula Vista has combined STAR-certified smog testing with ASE-certified mechanical repair since 2004, earning a BBB A+ rating over two decades of South Bay service. ASE certifications in Engine Electrical, Engine Performance, and Advanced Engine Performance equip the shop to diagnose OBD-II fault codes that cause smog failures and then perform the corrective repair under one roof, eliminating the multi-shop runaround that collision-claim customers experience when body facilities such as Nice & Easy Collision Center release vehicles still carrying powertrain DTCs. Bilingual English-Spanish service covers brake replacement, transmission diagnostics, and full engine repair across foreign and domestic platforms. The STAR designation authorizes the station to test gross-polluter-directed and high-emitter-profile vehicles that non-STAR facilities cannot certify, a regulatory tier that funnels the most complex emissions cases to the shop. AAA members coordinating tow-and-repair through AAA Chula Vista Insurance and Member Services land at the Main Street facility for same-day diagnostics that combine smog testing with mechanical inspection. The shop's most demanding repair sequences involve catalytic-converter replacement with CARB-compliant aftermarket units, followed by drive-cycle completion and STAR-protocol re-inspection to confirm that the repaired vehicle meets California tailpipe and OBD-II readiness standards.