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Audi B9 S4 Quattro 3.0T Rear Bumper Parts

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ES#4056580 - 006077LA01 - Audi B9 S4 Rear Diffuser - Gloss Black - Add some aggressive styling to your Audi! - ECS - Audi

Add some aggressive styling to your Audi! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Fits pre-facelift models (up to 2019) without integrated tips in the rear valance

Brand:
ECS - Corporate Logo
ES#:
4056580
Mfg#:
006077LA01
In Stock
ON SALE! SAVE 20%
$420.99

This product was last offered at the strikethrough price on
06-13-2026

$336.79 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3247439 - 023797ECS01 - Audi B9 S4 Carbon Fiber Rear Diffuser  - Hand-laid carbon fiber to upgrade your exterior styling - ECS - Audi

Hand-laid carbon fiber to upgrade your exterior styling affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Fits pre-facelift models (up to 2019) without integrated tips in the rear valance

Brand:
ECS - Corporate Logo
ES#:
3247439
Mfg#:
023797ECS01
In Stock
ON SALE! SAVE 34%
$1029.99

This product was last offered at the strikethrough price on
05-02-2026

$679.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4164511 - 004751la01 - Audi B9 S4 / A4 S-Line Rear Bumper Side Splitters - Gloss Black - Spice up the exterior of your Audi with gloss black spats! - ECS - Audi

Spice up the exterior of your Audi with gloss black spats! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Fits pre-facelift models up to 2019 model year

Brand:
ECS - Corporate Logo
ES#:
4164511
Mfg#:
004751LA01
In Stock
ON SALE! SAVE 25%
$133.99

This product was last offered at the strikethrough price on
06-13-2026

$100.49 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4751275 - 028801ECS01EBKT - Audi B9 S4 Pre-facelift Rear Diffuser & Trunk Spoiler - Add some aggressive styling to your Audi! - Enthusiast Bundles - Audi

Add some aggressive styling to your Audi! Don't See A Bundle You Want - Give Us A Call Or Chat - We Will Make One! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits pre-facelift models (up to 2019) without integrated tips in the rear valance

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4751275
Mfg#:
028801ECS01EBKT
In Stock
ON SALE! SAVE 34%
$696.26

This product was last offered at the strikethrough price on
05-05-2026

$458.51 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3980508 - 034-605-0008 - Motorsport Tow Hook - 105mm - Engineered to not only be the best looking tow-hook on the market, but the strongest! - 034Motorsport - Audi Volkswagen

Engineered to not only be the best looking tow-hook on the market, but the strongest! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3980508
Mfg#:
034-605-0008
In Stock
ON SALE! SAVE 10%
$195.00

This product was last offered at the strikethrough price on
06-28-2026

$175.50 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4641955 - E309 - Strap Style Tow Hook - Red - 5/8-11 Thread - Designed to handle any off-track adventure quickly and reliably - Rennline - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Designed to handle any off-track adventure quickly and reliably affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Universal 5/8-11 threads. Will not work on any OEM applications.

Brand:
Rennline - Corporate Logo
ES#:
4641955
Mfg#:
E309
Ships in 4 Business Days
$152.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4000981 - D38234 - Carbon Fiber Rear Diffuser - Designed and manufactured to improve performance and everyday drivability - Deval - Audi

Designed and manufactured to improve performance and everyday drivability affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Deval - Corporate Logo
ES#:
4000981
Mfg#:
D38234
Special Order: No Guaranteed ETA
$890.00 USD
This product is lifetime replacement eligible Lifetime Replacement
ES#4641959 - E313 - Strap Style Tow Hook - Red - Designed to handle any off-track adventure quickly and reliably - Rennline - Audi

Designed to handle any off-track adventure quickly and reliably affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Rennline - Corporate Logo
ES#:
4641959
Mfg#:
E313
Ships in 3 Business Days
$142.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3569432 - 023419ECS01-07 - B9 A4/S4 Race Tow Strap - Red - Look great on the track or street! - ECS - Audi

Look great on the track or street! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3569432
Mfg#:
023419ECS01-07
In Stock
ON SALE! SAVE 30%
$112.99

This product was last offered at the strikethrough price on
05-02-2026

$79.09 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3149378 - 020796ECS01A - Rear Bumper Reflector Film set - Gunsmoke - Pre-cut Lamin-X film to cover both reflectors on the rear bumper cover - ECS - Audi

Pre-cut Lamin-X film to cover both reflectors on the rear bumper cover affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Fits pre-facelift models only - up to 2019

Brand:
ECS - Corporate Logo
ES#:
3149378
Mfg#:
020796ECS01A
In Stock
ON SALE! SAVE 10%
$47.99

This product was last offered at the strikethrough price on
06-13-2026

$43.19 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4423776 - E300.24IN - 24" Silicone Rear Chip Guards - Pair - Protect the paint on your rear bumper from rocks and other road debris - Rennline - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Protect the paint on your rear bumper from rocks and other road debris affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
This product is Universal Fit. Please ensure you have a smooth painted surface to the rear of your wheel arch prior to ordering.

Brand:
Rennline - Corporate Logo
ES#:
4423776
Mfg#:
E300.24IN
Ships in 5 Business Days
$120.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2839865 - E82 - Rennline Universal Screw in Tow Hook Receiver - For your universal project - Rennline - Audi BMW Volkswagen Mercedes Benz MINI Porsche

For your universal project affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Rennline - Corporate Logo
ES#:
2839865
Mfg#:
E82
Ships in 4 Business Days
$32.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4423774 - E300.18IN - 18" Silicone Rear Chip Guards - Pair - Protect the paint on your rear bumper from rocks and other road debris - Rennline - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Protect the paint on your rear bumper from rocks and other road debris affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
This product is Universal Fit. Please ensure you have a smooth painted surface to the rear of your wheel arch prior to ordering.

Brand:
Rennline - Corporate Logo
ES#:
4423774
Mfg#:
E300.18IN
Ships in 5 Business Days
$105.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3552469 - E19213128MM - Rennline Folding Tow Hook - 128mm - Machined 300 series stainless steel with an increased side load capacity and adjustable-length rigid mount receiver - Rennline - Audi Volkswagen

Machined 300 series stainless steel with an increased side load capacity and adjustable-length rigid mount receiver affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Rennline - Corporate Logo
ES#:
3552469
Mfg#:
E19213128MM
Ships in 5 Business Days
$170.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2840464 - PH01 - GoPro Tow Hook Mount - Machined from billet aluminum - Rennline - Audi Volkswagen

Machined from billet aluminum affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For Rev1 (E13) Rennline Folding Tow Hooks only

Brand:
Rennline - Corporate Logo
ES#:
2840464
Mfg#:
PH01
Ships in 5 Business Days
$75.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4423775 - E300.20IN - 20" Silicone Rear Chip Guards - Pair - Protect the paint on your rear bumper from rocks and other road debris - Rennline - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Protect the paint on your rear bumper from rocks and other road debris affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
This product is Universal Fit. Please ensure you have a smooth painted surface to the rear of your wheel arch prior to ordering.

Brand:
Rennline - Corporate Logo
ES#:
4423775
Mfg#:
E300.20IN
Ships in 5 Business Days
$115.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Rear Bumper Parts

Everything from OEM replacement rear bumpers and Aftermarket replacement rear bumpers to diffusers, rear bumper aero, and more!

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Manufacturer names and/or part numbers are used only for identification purposes.

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