Rear lower valance
Restore factory looks and under-body aerodynamics with the genuine rear lower valance for the Audi A4 B8 platform. Part number 8K0 807 521 01C replaces scuffed or missing diffusers on non-S-line sedans and Avants, finishing the bumper with a satin-black spoiler lip that guides air around the exhaust and reduces drag.
Audi Rear Lower Bumper Valance 8K0 807 521 01C
Restore factory looks and under-body aerodynamics with the genuine rear lower valance for the Audi A4 B8 platform. Part number 8K0 807 521 01C replaces scuffed or missing diffusers on non-S-line sedans and Avants, finishing the bumper with a satin-black spoiler lip that guides air around the exhaust and reduces drag.
Key Benefits
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OEM-exact geometry — locator tabs and Torx mounts align perfectly with the standard rear bumper; installs in minutes, no cutting or drilling.
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Impact-resistant ABS/PP blend — flexible polymer survives parking knocks and stone spray while maintaining rigidity at motorway speeds.
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Factory satin-black finish — can be fitted unpainted for a stealth OE look or colour-matched for custom builds.
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Aerodynamic efficiency — diffuser profile channels airflow under the tail, helping stability and keeping the rear glass cleaner.
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Warranty-backed — protected by Audi Genuine Parts’ 24-month guarantee for complete peace of mind.
Vehicle Compatibility
| Make | Model | Chassis | Model Years | Notes |
|---|---|---|---|---|
| Audi | A4 Sedan & Avant | B8 (8K) prefacelift + facelift | 2009 – 2015 | Standard bumper without S-line kit |
| Audi | S4 Sedan & Avant | B8 (8K) | 2009 – 2015 | Direct fit |
Technical Specifications
| Specification | Detail |
|---|---|
| Part number | 8K0 807 521 01C (8K080752101C) |
| Position | Rear bumper – lower centre diffuser |
| Material | UV-stable ABS/PP polymer |
| Finish | Satin black, paint-ready |
| Fastening | Integrated clips + six OE Torx screws (reuse originals) |
| Weight | ≈ 1.1 kg |
| Warranty | 24 months |
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Park on level ground and remove the six Torx T25 screws from the old valance.
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Pull the diffuser rearward to release side clips; disconnect parking-sensor loom if fitted.
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Align the new valance; press firmly until all clips snap home.
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Re-install the screws (torque ≈ 3 Nm) working from centre outward.
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Wipe the part clean and inspect for uniform gaps around the bumper edge.
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