How to Install Roof Rails on Subaru WRX? | Fitment & Step Guide

Park the car on level ground, verify your year and trim, and gather a torque wrench, a trim removal tool, and the hardware from your rack kit. The install takes about 30 to 60 minutes with basic hand tools.

Which WRX Years Have Factory Mounting Points?

Subaru added factory fixed mounting points to the WRX and WRX STI starting with the 2018 model year. These points sit under small plastic access caps on the roof, evenly spaced near the front and rear. They accept most crossbar systems built for factory-point fitment, such as Thule kits THKIT3131 and TH7602B-TH7603B for the 2018 WRX. Earlier models, including the 2011 WRX and STI, lack these points. Installing rails requires removing interior trim to access the roof structure, then fitting an OEM or aftermarket rail kit. Some kits require drilling or permanent modification—confirm compatibility before purchase. A sunroof does not automatically mean rack-compatible; fitment depends on whether the specific trim has the right roof profile or a designed kit.

Installing Roof Rails on Factory Fixed Points

Step 1: Open the access caps. Locate the small rectangular covers on the roof and pop them off with gentle upward pressure using a trim tool. Store them safely.

Step 2: Position the front crossbar. Align the crossbar foot with the mounting hole closest to the windshield. The rear crossbar follows the same logic.

Step 3: Insert and hand-tighten the bolts. Place the bolt through the foot into the factory fixed point and turn until snug for all four feet before using a torque wrench.

Step 4: Torque to spec. Tighten main crossbar fasteners to 60–75 inch-pounds with a torque wrench. Install plastic covers over each foot and torque their fasteners to 30–35 inch-pounds. Repeat the sequence for the rear crossbar.

Step 5: Check firmness. Shake each rack by hand. Any detectable movement means a bolt is not fully seated—do not load gear until solid.

Installing Roof Rails on Earlier WRX Models

For WRX and STI models from around 2011 and earlier, the mounting hardware sits under the roof skin. The general sequence for an OEM-style rail kit:

Step 1: Remove interior trim. Carefully take off A-pillar covers, assist handles, visors, and trim strips along the roof edge. Some clips require a lateral push to release—prying straight up can break them. Work slowly and keep fasteners organized.

Step 2: Position the rail or rack. Line up both sides on the vehicle before locking any hardware. One side seated and the other misaligned can scratch the roof paint.

Step 3: Install and snug both sides. Work front and rear, tightening hardware evenly. Do not fully tighten until the rack is centered and symmetrical from both sides.

Step 4: Final tighten and check. Tighten all fasteners to the kit’s specified torque—these values vary by manufacturer. Shake each rack to confirm it is solid before loading cargo.

If your WRX lacks visible mounting points, verify fitment with the rack manufacturer before buying. If you are shopping, our tested roundup of the best WRX roof rails breaks down which kits fit each model year and mounting type.

FAQs

Can I install roof rails on a WRX with a sunroof?

Yes, but only if your specific trim has factory fixed mounting points or a rack kit designed for that roof profile. Check the rack manufacturer’s fitment tool using your VIN before buying.

Do I need to drill holes in my WRX roof for roof rails?

Many aftermarket kits use clamp-style feet without permanent modification, but some OEM-style kits require drilling. Confirm before purchasing.

What torque should I use for Subaru WRX roof rack bolts?

For factory fixed-point mounting on 2018+ models, torque main crossbar fasteners to 60–75 inch-pounds and cover fasteners to 30–35 inch-pounds. For earlier models or aftermarket kits, always follow the kit’s own instruction sheet.