Maxton Design Gloss Black Rear Diffuser/Valance/Apron Splitter Insert for BMW 1 Series M135i F20/F21 (2011-2015) – Rear Bumper Lower Lip Spoiler Trim

Gloss Black Rear Diffuser for BMW 1 Series M135i F20 and F21

Give your 1 Series hatch a sharper, motorsport-inspired look with this high-gloss rear lower bumper diffuser by Maxton Design. Designed for the BMW M135i F20 and F21 (2011 to 2015), this rear lower spoiler delivers aggressive styling with factory-level fit and finish. We have fitted these for customers and the feedback on fitment and appearance has been excellent.

Why enthusiasts choose this rear styling upgrade

• OEM-style fitment to the standard rear bumper for a clean, factory appearance
• Gloss black finish that transforms the rear end and enhances the stance
• Made from durable ABS plastic used widely across the automotive industry
• Lightweight with a touch of flexibility for everyday road use
• Tidy, direct-replacement design for the original insert

Compatibility

Compatible with BMW M135i F20 and BMW M135i F21, model years 2011, 2012, 2013, 2014 and 2015. Fits both 3-door and 5-door hatchbacks that use the standard M135i rear bumper.

What you receive

• Maxton Design rear diffuser in gloss black
• Self-tapping fixings

Fitment details

• Direct swap for the factory rear insert
• No cutting to the bumper required
• Remove the OEM diffuser and secure the new part using the supplied self-tapping screws
• View the fitting guide

Prefer professional installation for a perfect alignment and finish? MJ Modifications in Warwickshire can fit this for you. Request a quote: info@mjmodifications.co.uk

Materials and certification

• Premium ABS construction
• TUV MATERIALGUTACHTEN certified material

Important information

• The part arrives with a protective film. Only remove once you are certain of correct fitment, as removal will void returns.
• Do not remove the holographic verification sticker. It confirms the product is an authentic Maxton Design item. Removing it will void returns.
• Please check your vehicle against the listing and images to ensure compatibility.
• We cannot be held responsible for incorrect installation or misuse.
• We recommend installation by a qualified professional or follow the supplied fitting manual closely.

Search-friendly terms

BMW 1 Series M135i rear diffuser, rear lower valance, rear apron, rear splitter, rear bumper diffuser, gloss black rear insert, F20 rear bumper upgrade, F21 rear bumper upgrade, M135i body kit styling, performance rear lip, aerodynamic rear styling.