BMW F20 F21 LCI Carbon Fiber Side Skirt Extensions, 2016–2019 | M Sport / M135i / M140i

Carbon Fiber Side Skirt Extensions for BMW F20 / F21 LCI

Add a gloss carbon-fiber accent along the lower sides of your 1 Series hatchback. The source describes extensions that mount to the existing side skirts, not complete replacement rocker panels. A front lip or rear diffuser may complement the appearance but is not listed as part of this product.

Listed Vehicle Fitment

• BMW 1 Series F20 / F21 LCI hatchback.
• Body styles listed: 3-door and 5-door.
• Years: 2016–2019.
• Models listed: 116i, 118i, 120i and 125i with M Sport, plus M135i and M140i.
• Explicit exclusion: F20 / F21 Base models.

Confirm your VIN, production date, regional model year, door count and actual side-skirt profile before ordering. The source groups these applications without separately verifying every engine, chassis and year combination. Do not assume every model was available or compatible in every listed year. Pre-LCI vehicles, other generations and modified side skirts require separate verification.

Some original hidden filter entries use 2-door/4-door labels, whereas the main fitment uses 3-door/5-door hatchback descriptions; verify the actual body rather than relying on filter wording. “Base” within an M135i/M140i filter label does not resolve the source's general Base exclusion. Confirm the installed side-skirt design for those vehicles.

Material and Finish

• Specified material: 3×3 weave carbon fiber.
• The detailed description states reinforcement with a glass-fiber composite.
• Gloss lacquer and a double-layer UV-protected clear coating are listed.

Dry-carbon construction, laminate proportions and measured weight are not documented. No measured aerodynamic, downforce, handling or efficiency results are supplied, so performance improvements are not promised.

Package Details

The source lists side skirt extensions and installation tape. Exact extension piece count, left/right contents, dimensions and tape quantity are not itemized. The introductory description also refers to supplied hardware without identifying it; additional screws, clips or other fasteners are not confirmed. Verify the complete package before purchase rather than assuming a two-piece pair.

Installation

Professional installation is recommended. The source describes attachment to the existing side skirts and claims no modification is required, but does not provide a complete fastening specification. Confirm the component-specific instructions and any hardware requirements before fitting; neither a fixed installation time nor universal modification-free fitment is promised.

Test-fit and align the extensions before removing adhesive backing. Where tape is specified, clean and dry the mounting surfaces and follow the adhesive manufacturer's preparation, temperature and curing instructions. Tape inclusion does not establish that tape alone provides adequate attachment in every application.

Check door clearance, ground clearance and access to designated lifting points. Do not use the extensions as load-bearing steps or lifting points. Keep underlying equipment and required access unobstructed, and do not force parts onto mismatched side skirts.

Frequently Asked Questions

Are these complete replacement side skirts?
No. The source describes extensions mounted to existing side skirts.

Does it fit Base models?
The source explicitly excludes F20/F21 Base models. Verify actual side-skirt design, especially where filter trim names conflict.

Are both sides included?
Left/right contents and exact piece count are not itemized. Confirm the package before ordering.

Is tape included?
Yes. Tape is listed. Other hardware is mentioned generally but not identified.

Is it pure or dry carbon?
The source specifies carbon fiber with glass-fiber reinforcement. A pure-carbon laminate or dry-carbon process is not established.