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S4 · Cosmetic
S4 Trunk spoiler Install Guide
Your S4
Pick your year to see what fits.
This page covers US S4s only. The S5 has its own page.
Sportier rear end
Easy$150–$6001 hr
Why do it
A small spoiler adds a sporty look to the back of the car.
Tools you'll need
- Rubbing alcohol
- Painter's tape
- Clean cloth
Starting out? See our budget tool list.
Parts to buy
- ECS gloss black spoiler 028801ECS01 Listed for these years.Fits 2018–2025 · 3.0L turbo (B9)
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Before you start
- Clean the trunk well. Tape needs a clean, warm surface.
Steps
Clean the trunk
- Clean the surface.
Stick on the spoiler
- Line it up and press it on.
How to know it worked
- Spoiler sits straight and centered.
- Tape is fully stuck, with no lifted edges.
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Safety first
- Park on flat ground, set the parking brake and chock the wheels.
- Never get under a car held up only by a jack. Use jack stands.
- Let the engine and exhaust cool first.
- Disconnect the battery before unplugging electrical parts.
- Wear safety glasses.
- If something doesn't match your car, stop and ask a shop.
Follow your part's instructions and your service manual's torque specs.