Maxton Design BMW X4 G02 M Sport 2018–2021 Gloss/Piano Black Rear Bumper Side Splitters – Rear Spats, Corner Extensions, Valance Aero Fins/Bumper Corners – ABS Pair

Gloss Black Rear Corner Extensions for BMW X4 G02 M Sport 2018 to 2021 by Maxton Design

Sharpen the back end of your BMW X4 G02 M Sport with these high gloss rear corner extensions. Designed for the M Sport rear bumper on 2018, 2019, 2020 and 2021 models, this pair delivers a sportier, wider look that ties in perfectly with other piano black exterior accents. Expect a clean, factory-style finish with a stronger road presence and a premium, performance-led aesthetic.

MJ Modifications have fitted these to customer X4 G02 builds and the feedback has been excellent. The contour match, paint-like gloss and sturdy construction make these a go-to rear styling upgrade for owners who want a subtle yet aggressive visual boost without compromising on quality.

Highlights

• Vehicle specific to BMW X4 G02 with M Sport rear bumper 2018 to 2021
• Deep gloss black finish that complements OEM trim and shadowline details
• ABS polymer for impact resistance, light weight and everyday durability
• Enhances the rear valance with a wider stance and sharper lines
• Supplied as a left and right pair with fixings and online fitting guide
• Protective transport film applied from factory to keep the finish pristine
• No painting required thanks to the premium gloss surface

Fitment

Compatible only with BMW X4 G02 M Sport 2018 to 2021. Designed for the M Sport rear bumper on the G02 chassis.

What you receive

• Rear corner extensions - left and right
• Fitting kit
• Fitting manual link: View fitting manual

Material and finish

Manufactured from ABS plastic for strength and flexibility, delivered in a sleek gloss black finish. Each part arrives with a thin protective film to safeguard the surface in transit. Remove during installation to reveal the unmarked shine.

Installation

Professional fitting recommended for best alignment and secure mounting in line with the Maxton Design guide. For expert installation, contact MJ Modifications in Warwickshire for a quote: info@mjmodifications.co.uk.

Why choose this upgrade

If you are building a cohesive look with front splitters, side skirts and a rear diffuser, these corner extensions finish the rear bumper beautifully. They add a confident, performance-inspired look that suits the coupe SUV profile while keeping the OEM quality vibe. Our customers love the instant transformation and the precise fit.

Search terms customers use

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