The 2013–2016 Audi A4 and S4 B8.5 combine the balanced proportions of the original B8 platform with a sharper facelifted front end, revised lighting and updated lower-bumper styling. For many owners, the goal is an OEM-plus exterior that looks more defined without losing the clean and understated character of the Sedan.
This collection includes selected 2013–2016 Audi A4 / S4 B8.5 carbon fiber parts, including A4 Base front lips, center bumper trim, rear diffusers, rear bumper splitters, replacement mirror covers, headlight eyebrows and different trunk spoiler profiles. Each product has its own vehicle, trim, bumper, body-style and model-year requirements.
What Makes the Audi A4 and S4 B8.5 Different?
The B8.5 is the facelifted version of the earlier B8-generation A4 and S4. Its revised headlight shape, front fascia and lower bumper details give it a more angular appearance than the 2009–2012 pre-facelift model. These changes are also important for aftermarket fitment.
A front lip, center bumper trim or rear valance made for the earlier B8 should not be selected for a B8.5 only because both vehicles belong to the same broader A4 platform. Bumper-mounted parts must follow the exact contour and mounting area of the facelifted vehicle.
Owners of the earlier model should browse our 2009–2012 Audi A4 / S4 B8 parts. Parts for the later B9 generation should also be selected from a separate collection rather than assumed to fit the B8.5.
A4 B8.5 Base vs A4 S line vs S4 Fitment
The original bumper configuration is the most important fitment detail on this page. An Audi A4 B8.5 Base does not use the same lower front and rear bumper design as every A4 S line or S4. Products designed around the Base bumper should not be treated as universal A4 and S4 parts.
The A4 front lip and center lip products in this collection are intended for selected A4 B8.5 Base Sedan configurations. An A4 S line or S4 owner should not order these parts unless the individual listing explicitly confirms the sport bumper.
Some A4 S line and S4 exterior areas may appear similar, but rear-diffuser compatibility still depends on the factory valance and exhaust layout. Compare the complete bumper, lower openings, outer corners and exhaust-tip positions rather than relying only on the A4, S line or S4 badge.
Choosing an Audi A4 B8.5 Front Lip or Center Lip
A full Audi A4 B8.5 front lip and a center bumper lip produce different changes to the vehicle. A full-width front lip follows more of the lower bumper and gives the front profile a lower, more continuous appearance.
A center lip or center bumper trim covers only the middle area. It is better suited to owners who want a smaller carbon fiber detail without adding a complete lower extension across the bumper.
Check the product photos, installation area and number of pieces before ordering. Search results may use the terms front lip, splitter, center lip and spoiler interchangeably, but these products are not necessarily the same shape or size.
Ground clearance should also be considered before selecting a complete front lip. Lowered suspension, steep driveways and existing bumper damage can affect installation and everyday use. Complete a test fit before drilling or applying permanent adhesive.
A4 and S4 B8.5 Rear Diffuser Compatibility
A rear diffuser must match the original rear bumper, lower valance and exhaust configuration. The A4 B8.5 Base rear diffuser in this collection is designed around the standard A4 bumper and should not be assumed to fit an A4 S line or S4 rear bumper.
The S4 B8.5 rear diffuser follows a different rear-bumper and exhaust layout. Confirm the number, width and position of the exhaust openings, especially when the vehicle has larger tips or an aftermarket exhaust system.
Also check whether the product replaces the factory lower valance or attaches to an existing bumper section. Replacement-style products require the original valance to be removed and must match the factory tabs, screw locations and outer edges.
The S4 rear diffuser currently listed on this page has a narrower product-specific year range than the full 2013–2016 collection. Always follow the exact years shown on the individual product page. The collection year range does not override a product’s own fitment information.
Rear Bumper Splitters vs a Full Rear Diffuser
Rear bumper splitters are not the same as a complete rear diffuser. A full diffuser changes most of the lower center valance and usually surrounds the exhaust openings. Rear bumper splitters are separate left-and-right pieces positioned closer to the outer bumper corners.
Splitters provide a more restrained rear upgrade for owners who want to emphasize the bumper edges without replacing the full center section. Confirm that the listing includes both sides and matches the A4 B8.5 Base bumper shown in the product photos.
Some rear-splitter listings offer carbon fiber and fiberglass variants. Check the selected material before checkout. A matte or glossy fiberglass option should not be mistaken for a visible carbon fiber finish.
Choosing an Audi A4 or S4 B8.5 Trunk Spoiler
Trunk spoilers are one of the most varied product groups for the B8.5 Sedan. This collection contains several Audi A4 B8.5 Base trunk spoilers and a separate S4 trunk spoiler, with differences in height, center curve, outer-tip shape and how far each spoiler extends across the trunk lid.
A lower lip-style spoiler creates a restrained OEM-plus appearance. A more pronounced design places greater visual emphasis on the rear deck and is easier to see from side and rear three-quarter angles.
Style names such as M4-style, S4-style, PSM-style or high-kick describe the general shape of a spoiler ; they do not change the required vehicle fitment. An M4-style product listed for an Audi A4 is still intended for the specified A4 trunk and does not imply BMW compatibility.
Compare the actual product images instead of choosing only by the phrase “Audi A4 B8.5 trunk spoiler.” Confirm the Sedan body style, A4 Base or S4 application, material option and installation surface before ordering.
Replacement Mirror Covers and Lane Change Assist
The mirror covers available in this collection use a replacement-style design. Unlike an add-on shell that attaches over the original mirror, a replacement cover requires removal of the factory housing and must match the original clips, indicator position and internal mounting structure.
Lane change assist is a key configuration difference. Vehicles equipped with the factory warning light or Side Assist system may require a mirror cover with the correct opening. Vehicles without that feature require the corresponding non-assist version.
The same replacement mirror product may also list the Audi A5, S5 or RS5 because related vehicles can use similar housings. On this collection page, compatibility should still be evaluated from the A4 and S4 B8.5 perspective. Do not use the shared model list as proof that every year, body style and regional specification is identical.
Headlight Eyebrows and the B8.5 Front-End Shape
Carbon fiber headlight eyebrows are a smaller visual upgrade than a front lip, but they are closely connected to the B8.5 facelift design. The pieces follow the upper contour of the revised headlight and add a more defined line around the front lighting area.
Because the B8 and B8.5 use different headlight shapes, B8.5 eyebrows should not be selected for the earlier pre-facelift model. Compare the product outline with both headlights before applying tape or adhesive.
Clean the mounting surface and test the left and right pieces before final installation. Small alignment differences are especially visible around the headlights, so both sides should follow the same position and angle.
Confirm Your 2013–2016 Audi A4 or S4 Before Ordering
Before checkout, confirm the model year, A4 or S4 model, Base or S line trim, Sedan body style, original bumper and intended installation area. Also review the product-specific year range, material, finish, number of pieces and add-on or replacement construction.
Customers comparing the next generation can browse our 2017–2019 Audi A4 / S4 B9 parts. To compare all available generations, visit Audi A4 / S4 parts by generation. Additional Audi models can be found through our Audi parts by modelcollection.
When fitment remains uncertain, send the vehicle year, trim and clear photos through our Audi A4 / S4 B8.5 fitment supportpage. Useful photos include a direct front or rear view, a close photo of the bumper or mirror housing and a clear image of the intended mounting area.
Test fitting is recommended before final installation. Larger bumper components should normally be installed by an experienced automotive body or modification workshop to support even alignment.
