Rear Diffuser for BMW 3 Series E90 M Sport Sedan 2005-2012, Dual or Quad Exhaust, Carbon Fiber or Matte Black FRP
Available in stock (20)
Rear Diffuser for BMW 3 Series E90 M Sport Sedan (2005-2012)
A replacement for the factory plastic rear diffuser on the M Sport rear bumper of the E90 3 Series sedan, giving the rear of the car a more dynamic look. The carbon fiber version shows a twill weave that matches other carbon parts on the car and is finished in a UV-protected gloss clear coat to resist fading, and a matte black fiberglass (FRP) version is also available. Choose the exhaust cut-out that matches your car: dual or quad. Each diffuser is quality checked before dispatch.
Options
- Dual exhaust holes, carbon fiber
- Quad exhaust holes, carbon fiber
- Dual exhaust holes, matte black fiberglass (FRP)
- Quad exhaust holes, matte black fiberglass (FRP)
Fitment
- BMW 3 Series E90 2005-2012
- Models: 318i, 320i, 323i, 325i, 328i, 330i, 335i
- Required: M Sport rear bumper
- Body style: Sedan, 4-door
- Position: Rear bumper, lower diffuser
- Not for: E90 base models without the M Sport bumper, or the M3
The M Sport rear bumper is required, and the exhaust option must match your car's exhaust layout. Confirm your model and year by VIN, or send photos of your rear bumper, before ordering.
Specifications
- Material: Carbon fiber with twill weave, or fiberglass (FRP)
- Finish: Carbon: UV-protected gloss clear coat. FRP: matte black
- Manufacturing: 3D design, CNC moulding, test-fitted on an actual vehicle
- Type: Replacement diffuser
- Mounting: Self-tapping screws included
- Packaging: Multi-layer protective export carton, shockproof
Installation
- Remove the factory plastic diffuser and fit this one in its place.
- Mounting uses the supplied self-tapping screws, which may make new holes and is not fully reversible. Professional installation is recommended.
- Dry-fit and check alignment, exhaust clearance and every screw position before fixing.
FAQ
Dual or quad, which do I need? Count the exhaust tips on your car and choose the matching option.
Does it fit an E90 without M Sport? No. M Sport rear bumper only.
Does it fit the E90 M3? No.
Does it replace the factory diffuser? Yes. The original plastic diffuser comes off and this one goes in its place.
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Stephanie L.
Ordered the BMW front bumper fog light grille and the fitment was absolutely perfect. Gloss black finish looks factory-fresh and the quality is outstanding. Installation took about 30 minutes — no drilling required. Highly recommend AlchemyRide!
Marcus R.
Fast shipping, great packaging, and the part arrived in perfect condition. The grille fits my F23 like a glove — exactly as described. Customer service was also super responsive when I had a fitment question. Will definitely order again.
David K.
I've bought aftermarket parts from many stores but AlchemyRide stands out for quality and value. The part was well-made, fit perfectly, and the price was very competitive. My BMW looks aggressive and clean — exactly what I wanted.
Jenny T.
Excellent product and super easy to install. The gloss black finish matches my M Sport bumpers perfectly. Shipping was faster than expected and the part was well-packaged. Very happy with my purchase — my car looks completely transformed!