BMW F20 Side Skirts: Where to Start
Finding the right BMW F20 side skirts takes more than choosing a style. You need to check the chassis, choose a material for your driving needs and make sure the part will fit properly. This guide covers those points for the F20/21 range.
This guide sorts through that, using what we know from building side skirts for the F20/21 range ourselves.
If your 1 Series spends its days on London roads, you already know how quickly kerbs, speed bumps and tight parking bays put a low part to the test. That's worth keeping in mind as we go.
F20 or F21? Get this right first.
F20 is the 5-door 1 Series hatchback; F21 is the 3-door. Both share the same generation (2011–2019), but the panel shapes underneath aren't identical, which is why fitment is listed for the F20/21 generation specifically rather than as a generic "1 Series" part. There's also a pre-LCI and LCI (facelift) split within that production run, and bumper and sill details shift slightly between the two.
Before you buy anything, from us or anyone else, check your registration against the chassis code, not just the model year on the V5. A lot of return requests in this category come down to buyers assuming "1 Series" is one universal shape. If you're not sure which you've got, it's worth a quick call before ordering rather than guessing.
What "side skirts" actually means here
There are three different products people lump under "BMW F20 side skirts," and they're not interchangeable.
- Genuine OEM sill covers, factory parts, sold used, colour-coded to the original paint. These replace like-for-like but don't add an aggressive look.
- Aftermarket ABS side skirts, moulded to sit over or replace the standard sill, shaped for a lower, sportier profile. This is what most people mean when they search the term.
- Carbon fibre side skirt extensions, add-on pieces that sit beneath an existing skirt rather than replacing it, aimed at track or show builds rather than daily use.
Ours falls into the second category. An ABS plastic side skirt in a gloss black finish, shaped to tuck along the F20/21 sills for a lower profile that reads as factory-fit rather than a generic bolt-on part.
Here's how the three options stack up side by side.
| Aftermarket ABS side skirts | Genuine OEM sill cover (used) | Carbon fibre extension | |
|---|---|---|---|
| Look | Gloss black, OEM-aggressive | Colour-matched, standard factory shape | Aggressive, track-focused |
| Typical use case | Daily driving + styling | Like-for-like replacement | Show cars, track builds |
| Fitment | Direct-fit for F20/21 | Direct-fit (genuine part) | Sits under existing skirt, install-heavy |
| Durability day to day | Built to handle daily knocks | Depends on condition (used part) | Less forgiving of kerb strikes |
| Colour options | Gloss black only | Whatever the donor car was | Usually gloss/matte carbon only |
None of these is objectively "better", it depends what you're trying to achieve. Want the factory colour back? Genuine is the answer. Building for track days? Carbon might make sense. Want a lower, sportier stance without a four-figure spend or a paint-matching headache? That's the gap ABS side skirts fill.
Material and fitment, in plain terms
Our F20/21 side skirts are manufactured from ABS plastic with a gloss black finish, built to withstand daily driving while delivering a sharp, performance-inspired appearance. ABS is the more forgiving of the two plastics we work with (the other being FRP), it flexes slightly under a light knock rather than cracking, which matters if the car's actually being driven and not just shown.
Installation is bolt-on, with professional fitting recommended, and fixings aren't included unless stated on the listing. If you're not confident fitting it yourself, factor a fitter into your budget before you order; it is a straightforward job for someone who's done it before, less so as a first DIY project.
Quick fitment checklist
- Confirm F20 (5-door) vs F21 (3-door) from your V5, not just "1 Series"
- Check pre-LCI vs LCI if you're unsure of your build year
- Confirm your rocker panels haven't been modified or previously damaged
- Budget for professional fitting if you're not doing it yourself
- Decide gloss black (fixed) vs painting to match, ABS can be painted, but comes gloss black as standard
Why drivers go with an ABS side skirt over genuine or carbon
There isn't a single "best" answer here, but for most F20/21 owners the ABS route hits the middle ground. A factory-look fit without the cost of carbon, and a more aggressive stance than a genuine sill cover gives you, with no paint-matching required since it comes gloss black as standard.
If that's the brief, the BMW 1 Series F20/21 Side Skirts – Gloss Black are £129, with free UK mainland shipping included in that price and orders processed in 1 to 3 working days, no separate delivery charge added at checkout.
They're part of the wider F20/21 range too, so if you're building the full look.
- Front splitter, sits flush with the F20/21 bumper
- Spoiler, sharper rear lip
- Rear diffuser, more aggressive edge underneath (F20 and F21 use separate diffusers, so check the model page)
FAQ
Will BMW F20 side skirts fit an F21 as well?
Yes, the F20/21 side skirts are built for both the 5-door and 3-door 1 Series from 2011 to 2019, but it's worth double-checking your rocker panel condition before ordering since damage or previous modification can affect fit.
Do I need to paint gloss black ABS side skirts?
No. They come finished in gloss black, so there's no paint-matching step required unless you specifically want a different colour.
Can I fit these myself?
It's bolt-on fitment, but professional fitting is recommended. If you're comfortable with basic trim removal and refitting, it's manageable; if not, budget for a fitter.
What's the difference between ABS and FRP side skirts?
ABS is the more flexible, impact-resistant plastic, while FRP holds a sharper edge but is less forgiving in a knock. For F20/21 skirts, ABS is used specifically because it copes better with daily driving.
Is shipping really free, or does it get added later?
Free UK mainland shipping is included in the price shown, there's no extra delivery line at checkout.
Before you order
If you're still not 100% sure whether you've got an F20 or F21, or which build year you're working with, it's worth a call rather than a guess, get in touch with the team with your registration and they'll confirm before you buy, backed by real UK phone and email support rather than a contact form into the void. Otherwise, browse the BMW F20 side skirts directly, or the full F20/21 range if you're building out the whole look.
Ready to Lower Your F20/21?
Check your chassis code, then pick up the BMW 1 Series F20/21 Side Skirts in gloss black for £129, with free UK mainland shipping and dispatch in 1 to 3 working days. Not sure whether you've got an F20 or an F21? Send us your registration and we'll confirm fitment before you order.
Shop F20/21 Side SkirtsContact the Team