Engine & Transmission Repair
Full rebuilds, replacements, and performance repairs to restore power and reliability to your vehicle.
Se Habla Español
Expert Auto Repair in Covina
Trusted diagnostics, honest repairs, and fair pricing to keep you safely on the road. Family-owned shop serving Covina and the San Gabriel Valley since 1994.
Complete Auto Care Services
From routine maintenance to complex repairs, our ASE-certified technicians handle it all with precision and care.
Air Conditioning Service
Stay cool in the California heat with complete A/C diagnostics, recharge, compressor repair, and leak detection.
Heating System Service
Keep your cabin warm and defrosters working with heater core, blower motor, and thermostat repairs.
Radiators & Water Pumps
Prevent overheating and engine damage with cooling system flushes, radiator replacements, and water pump service.
Brake Service & Repair
Protect what matters most with brake pad replacement, rotor resurfacing, caliper service, and full system inspections.
Computer Diagnostics
Pinpoint the exact problem fast with advanced OBD-II scanning and electrical system diagnostics, saving you time and money.
Clutch Repair
Smooth shifting restored with clutch replacement, hydraulic system repair, and manual transmission service.
Full Safety Inspections
Comprehensive multi-point inspections to catch issues before they become costly breakdowns on the road.
Why Customers Trust Us
Covina locals choose Auto Comp Diag and Repair for honest estimates, quality workmanship, and personalized service every time.
Expert Diagnostics
We do not guess. Our state-of-the-art diagnostic tools and decades of experience let us identify the root cause quickly so you pay only for the repair you actually need.
Certified Technicians
Our team is trained and certified to work on all makes and models, foreign and domestic. Your vehicle is in skilled, experienced hands.
Se Habla Español
We proudly serve our bilingual community. Communicate comfortably in Spanish and get clear explanations of every repair and cost.
Shop Hours
- Monday 8:00 AM - 5:00 PM
- Tuesday 8:00 AM - 5:00 PM
- Wednesday 8:00 AM - 5:00 PM
- Thursday 8:00 AM - 5:00 PM
- Friday 8:00 AM - 5:00 PM
- Saturday 8:30 AM - 12:00 PM
- Sunday Closed
