Incorporated in 1993 and operating from 3502 University Ave, A & B Auto Repair has served North Park's general automotive repair needs for over three decades from the same location. Post-repair vehicles requiring California smog certification head to Excel Smog on Wabash Ave for state-mandated emissions testing. The shop performs oil and filter changes, brake pad and rotor replacement, tire rotation, suspension work, and full engine diagnostics on domestic and import vehicles. Parts sourcing for specialty repairs draws from O'Reilly Auto Parts on El Cajon Blvd when same-day availability is required. The shop's most complex procedures involve full timing-belt and water-pump replacements on interference engines, where incorrect installation risks catastrophic valve-to-piston contact.