Genuine BMW F40 1 Series M135i xDrive M Performance Carbon Fibre Rear Diffuser - OEM Fit, Part 51192467256, Fits F40 incl. 128ti (2018+)

Original BMW F40 1 Series Rear Carbon Diffuser Upgrade – Part 51192467256

Transform the back end of your F40 hatchback with this authentic BMW carbon rear lower diffuser for M135i xDrive and 128ti. Crafted in genuine CFRP with a premium gloss finish, this factory accessory integrates perfectly with the standard rear bumper to deliver sharper styling, pronounced aero fins and a purposeful motorsport look.

We fit these regularly for customers and the feedback is consistently excellent. If you want an original BMW rear valance that aligns flawlessly, enhances stance and looks as if it left the showroom that way, this is the one to choose.

Why enthusiasts choose this carbon rear insert

• Authentic BMW accessory for the F40 platform – designed and tested by BMW
• Real carbon fibre (CFRP) with a deep gloss, uniform weave and premium finish
• Direct factory-style fitment for seamless alignment with the rear apron
• Enhances the performance aesthetic of the M135i AWD and 128ti models
• Durable, lightweight construction for long-lasting OEM quality

Compatibility

• BMW 1 Series F40 5-door, including M135i xDrive (2018 on)
• BMW 1 Series F40 128ti (2018 on)

Part number

51192467256

Fitment and installation

Professional installation available at MJ Modifications, Warwickshire. Request a fitting quote: info@mjmodifications.co.uk. Our team has installed this diffuser on numerous F40 vehicles and owners love the transformation in appearance.

Genuine part benefits

• Original equipment quality – precise clips, mounts and tolerances
• Consistent carbon weave and clearcoat for a high-end finish
• Perfect visual match to other BMW carbon accessories

Compatibility check

For peace of mind, we can verify fitment before dispatch. Provide your UK registration or last 7 of your VIN at checkout and we will confirm suitability for your car.

Manufacturer

BMW – Genuine BMW M Performance Parts.

Warranty

Two years manufacturer warranty for UK customers and one year for international customers when a VIN is provided at checkout on compatible vehicles.

Popular search terms

BMW F40 rear valance carbon, M135i rear bumper insert, BMW 1 Series F40 carbon rear lower diffuser, BMW 128ti carbon rear apron, BMW OE carbon diffuser, BMW F40 rear splitter carbon, original BMW rear diffuser F40, CFRP rear diffuser F40, M135i xDrive rear styling upgrade, BMW F40 performance aero kit, genuine BMW rear lower trim carbon, F40 1 Series carbon rear panel, M135i AWD carbon diffuser UK.