Toyota Corolla Hatchback Rear Bumper Diffuser Install

Quick answer

Installing a TOM'S Racing rear bumper diffuser on your 2019-2022 Toyota Corolla Hatchback requires drilling pilot holes and cutting the factory bumper. This guide walks you through each step.

Installation steps

1. Prepare the car and tools: Park on a level surface, chock the front wheels, and raise the rear with jack stands. You'll need a drill with 1/8" bit, a jigsaw with fine-tooth blade, masking tape, a marker, and a trim removal tool. Common mistake: skipping jack stands. The car must be stable to drill accurately.
2. Remove the factory rear bumper cover: Use a trim removal tool to pop the plastic clips along the bumper edge. Unclip the lower section and set it aside. You'll see the metal bumper beam underneath. Checkpoint: label the clips as you remove them so reinstallation is easier.
3. Mark and cut the bumper opening: Hold the diffuser in position against the bumper beam. Use masking tape to trace the cut line on the factory bumper cover. Cut along the line with a jigsaw, staying inside the tape to avoid chipping paint. Common mistake: cutting too much. Measure twice, cut once. Leave a 1/8" gap for the diffuser to fit snugly.
4. Drill pilot holes in the body panels: Position the diffuser against the underside of the bumper beam. Mark the drilling points through the diffuser's mounting tabs. Drill 1/8" pilot holes into the body panels. Do not drill into the exhaust or fuel lines. Checkpoint: verify no wiring or hoses are behind the drilling area. Use a flashlight.
5. Attach the diffuser: Align the diffuser with the pilot holes and secure it using the supplied hardware (typically self-tapping screws or bolts). Tighten evenly, but don't overtighten—plastic can crack. Common mistake: overtightening the screws. Snug is enough; the diffuser will flex slightly.
6. Reinstall the bumper cover and test fit: Clip the factory bumper cover back into place. Check that the diffuser sits flush and doesn't rub against the exhaust tips. If it contacts the exhaust, you may need exhaust hangers to create clearance. Checkpoint: drive a short distance and recheck for rattles or contact. Adjust as needed.

Product facts

• TOM'S Racing- Rear Bumper Diffuser for 2019-2022 Toyota Corolla Hatchback: TOM'S Racing Rear Bumper Diffuser for 2019-2022 Toyota Corolla Hatchback, plus 28mm lower from the vehicle body, requires drilling pilot holes and cutting the factory rear bumper. The diffuser gives a sportier stance and works with aftermarket exhausts, but installation is permanent and requires careful measurement.