Services
Auto Body & Truck Accessories for Downey Drivers
Collision repair, bedliners, tonneau covers, running boards — backed by a lifetime warranty. Downey drivers make the short drive for the quality and credentials that most local shops don't have.
Collision Repair
I-CAR Gold Class certified. Factory materials, computer color matching, full insurance claim handling for all carriers serving Downey.
DRP Shop — All InsuranceSpray-In Bedliners
Rhino Liner certified installation — same-day, permanent bond, lifetime warranty. The real thing, done right.
Lifetime WarrantyTonneau Covers
BakFlip MX4, BakFlip Revolver X4, and other top brands. All truck makes and models professionally installed.
All Makes & ModelsRunning Boards & Side Steps
Fixed, nerf bar, and power/electric retractable running boards for all trucks and SUVs including lifted.
Electric Steps AvailableAuto Paint
Computer color-matched painting for factory-quality results on panel repairs or full repaints.
Computer Color MatchWhy 3J's
What Downey Drivers Find When They Come to 3J's
Every credential. The lifetime warranty. And a shop that treats every car like it matters.
I-CAR Gold Class
Highest collision repair training certification. Continuous education on all vehicle tech and repair methods.
ASE Certified
Every technician ASE certified — verified skill and professionalism on every job.
Lifetime Warranty
Every job backed for life — no exceptions, no fine print.
Insurance Partner
DRP shop for major carriers. We handle the adjuster and all paperwork while you wait for your car.
Getting Here from Downey
15 Minutes via the 710 or 605
From Downey, Signal Hill is a straight shot south on either freeway.
3J's Auto Body & Paint
Address: 1855 E 29th St, Signal Hill, CA 90755
From Downey via 710: Take the 710 South toward Long Beach to the E Willow St / 29th St area. About 12–15 minutes.
From Downey via surface streets: Long Beach Blvd south all the way to E 29th St in Signal Hill. Straight shot, no freeway needed.
Hours: Monday – Friday, 8:00 AM to 5:00 PM
Get DirectionsQuestions from Downey Customers
Common Questions — Answered Straight
Yes — and Downey customers tell us it was worth it. We hold I-CAR Gold Class certification and offer a lifetime warranty on all work. For a 15-minute drive you get the highest-trained technicians and permanent peace of mind on every repair, bedliner, or installation.
🏆 Lifetime WarrantyYes. We work with all major insurance companies and are a DRP shop for select carriers. We communicate directly with your adjuster, handle all paperwork, and keep you updated throughout. Just drop the car off.
🤝 All Insurance WelcomeYes. We're a certified Rhino Liner installer — not just any shop claiming to do bedliners. Certified installation means proper prep, proper application, proper bond. Same-day, lifetime warranty.
✅ Rhino Liner CertifiedWalk-ins welcome for estimates, Mon–Fri 8AM–5PM. Call ahead for guaranteed same-day attention: 562-424-6744.
🚶 Walk-Ins Welcome