Audi A5, S5 & RS5 B9/B9.5: Taillights, Carbon Fiber Upgrades & What Owners Are Buying

The Audi A5, S5, and RS5 B9 platform is one of the most active on our site — with strong demand for taillights, spoilers, front bumpers, and side skirts. Here’s a complete breakdown of what B9 and B9.5 owners are upgrading and why.

The Most Popular Upgrade: B9.5 Taillights

Taillights for the Audi B9.5 A5/S5/RS5 are consistently among the most viewed and most searched products on our site. The LCI-style taillight upgrade gives the B9 (pre-facelift) the look of the updated B9.5 — a facelift-level refresh at a fraction of the cost. Sequential turn signals, smoked or clear lens options, and plug-and-play installation make this one of the most popular upgrades for the entire A5/S5 platform.

Why it’s so popular: The B9.5 taillight design is significantly more modern than the B9 original. Owners of 2017–2019 A5/S5 models use this upgrade to bring their car visually up to date without a full facelift.

Carbon Fiber Front Bumper / Front Lip

Front bumper upgrades and carbon fiber front lips are heavily searched for the S5 specifically. The S5 B9 front bumper has a sport-oriented lower section that responds well to a carbon fiber front lip or full front bumper replacement. Available for both B9 and B9.5 chassis — confirm your facelift status before ordering.

Best for: Audi S5 B9, RS5 B9, A5 S-Line B9

Carbon Fiber Trunk Spoiler

The PSM-style carbon fiber trunk spoiler is the most searched exterior upgrade for the A5/S5 coupe. It transforms the rear profile with a high-kick design that adds downforce and visual drama. Available for both B9 and B9.5 chassis in gloss and matte finish.

Most searched variant: “2016 Audi S5 coupe carbon fiber spoiler” — the B9 coupe is the most popular body style for this upgrade.

Carbon Fiber Side Skirts

Side skirts are a popular search for S5 owners — the S5’s wide coupe body responds particularly well to side skirts that visually lower the car and connect the front and rear aero elements. Available for B9 and B9.5 chassis.

Carbon Fiber Rear Diffuser

The A5/S5/RS5 rear bumper has a sport-oriented cutout that suits a carbon fiber diffuser well. The RS5 trim in particular has a wide rear bumper with quad exhaust outlets that pairs naturally with a blade-style carbon fiber diffuser.

B9 vs B9.5: Key Differences for Upgrades

Feature	B9 (2016–2019)	B9.5 (2019+)
Taillights	Original design — popular upgrade target	Updated LCI design
Front bumper	Pre-facelift lower section	Revised lower section
Trunk lid	Same profile	Same profile
Spoiler fitment	Compatible	Compatible

Key rule: Taillights and front lips are chassis-specific between B9 and B9.5. Spoilers and mirror caps are typically compatible across both.

The Complete B9/B9.5 Upgrade Sequence

1. Taillights — highest-impact single upgrade for B9 owners
2. Trunk spoiler — transforms the rear profile
3. Front lip — completes front-to-rear aero
4. Side skirts — connects the full aero package
5. Rear diffuser — finishes the rear bumper

Browse the A5/S5/RS5 Collection

Carbon District stocks taillights, spoilers, front lips, diffusers, and side skirts for the Audi A5, S5, and RS5 B9/B9.5. All parts are specified by chassis code and body style. Contact us with your VIN or chassis code if you’re unsure about compatibility.