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Audi A4 B9 Sedan Carbon Fiber Gloss Black Rear Bumper Diffuser 2018 - 2019
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Regular price
$724.00
Sale price$659.99
Save $64.01
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Transform the lower rear profile of your Audi A4 B9 Sedan with this genuine carbon fiber rear bumper diffuser, precision manufactured using a 3D design and CNC moulding process with full autoclave curing and vacuum moulding. Designed specifically for the A4 B9 factory rear bumper — and not compatible with the S4 — this diffuser adds a wider, more aggressive lower rear appearance with a deep gloss epoxy polished carbon black finish that showcases the natural carbon weave. At 130cm wide, the diffuser delivers comprehensive lower rear bumper coverage that visually lowers and widens the rear stance of the A4 B9 Sedan. Adhesive tape installation provides a clean, no-drill fitment with no permanent modification to the factory rear bumper.
Features:
Genuine carbon fiber construction – autoclave cured and vacuum moulded using 3D design and CNC moulding for precise diffuser geometry, consistent panel quality, and high structural integrity
High-gloss epoxy polished surface in carbon black – showcases the natural carbon weave and resists UV exposure, moisture, and road debris over sustained outdoor and driving use
Purpose-designed A4 B9 rear bumper diffuser profile – adds width and aggression to the lower rear bumper for a more planted and performance-oriented rear stance
Adhesive tape installation – clean, no-drill fitment with no permanent modification to the factory rear bumper
Wide 130cm panel coverage delivers a comprehensive lower rear bumper upgrade for maximum visual impact
Dimensions: 130 x 43 x 23 cm (51.18 x 16.93 x 9.06 in)
Installation Method: Adhesive Tape (included)
Fitment: A4 B9 Factory Rear Bumper Only
Purpose: Retrofit / Upgrade
Fitment:
Audi A4 B9 Sedan (2018–2019)
Compatible with A4 B9 factory rear bumper only
Does NOT fit S4 – confirm your model is standard A4 B9 before ordering
Sedan body style only – not confirmed for Avant or Allroad variants
Contents:
1x Carbon Fiber Rear Bumper Diffuser
Adhesive Tape for installation included
Benefits:
Genuine autoclave carbon fiber delivers an authentic carbon weave appearance and superior strength-to-weight ratio over carbon-look ABS or fiberglass alternatives
High-gloss epoxy finish maintains the premium carbon black surface appearance over prolonged outdoor and driving exposure without fading or yellowing
Rear diffuser profile adds width and visual aggression to the lower rear of the A4 B9 Sedan for a more track-inspired and purposeful exterior stance
Wide 130cm panel width provides comprehensive lower rear bumper coverage for a more complete and finished rear end upgrade
Adhesive tape fitment is clean and reversible – no drilling, no bumper modification, and no permanent commitment to the factory bodywork required
Installation Notes:
Adhesive tape supplied – thoroughly clean, degrease, and dry the factory rear bumper surface before installation to ensure maximum adhesion strength
No drilling or permanent bodywork modification required – fully reversible installation
Compatible with A4 B9 factory rear bumper only – will not fit S4, aftermarket rear bumpers, or non-A4 B9 bumper configurations
This product does NOT fit the S4 – confirm your vehicle is the standard A4 B9 before ordering
Sedan body style only – not confirmed for Avant or Allroad body variants
Professional installation recommended for optimal panel alignment and finish quality
If unsure about compatibility with your specific A4 B9 variant or bumper configuration, contact our team with your year, model, and trim level before ordering
Shipping Information:
Processing Time: 2-5 business days for warehouse stock items
Made-to-Order: Please allow 2-4 weeks for shipping if product requires custom manufacturing
Warranty:
12-month standard warranty from date of purchase
Contact our support team for assistance with any issues
* Rates from 0–36% APR. Payment options through Affirm are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. CA residents: Loans by Affirm Loan Services, LLC are made or arranged pursuant to a California Finance Lenders Law license. For licenses and disclosures, see affirm.com/licenses. For example, a $800 purchase could be split into 12 monthly payments of $72.21 at 15% APR or 4 interest free payments of $200 every 2 weeks.
**Rates from 0%-36% APR. Payment options through Shop Pay Installments, are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. State notices to consumers https://www.affirm.com/licenses.
Audi A4 B9 Sedan Carbon Fiber Gloss Black Rear Bumper Diffuser 2018 -
