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BMW

Genuine BMW Right/O/S Floorpan Cover Extension Undertray/Underbody Shield 1 Series F20 F21 & 2 Series F22 F23 OEM 51757241838 Fits 114d 116d 118d 120d 125i 125d 218d M135i M140i xDrive

Genuine BMW Right/O/S Floorpan Cover Extension Undertray/Underbody Shield 1 Series F20 F21 & 2 Series F22 F23 OEM 51757241838 Fits 114d 116d 118d 120d 125i 125d 218d M135i M140i xDrive

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Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.

BMW F20 F21 F22 F23 RH Lower Underfloor Guard - OE Part 51757241838

Refresh the underside of your BMW with this factory-spec right-hand lower cover, OE part number 51757241838. Designed for the F20 and F21 1 Series and the F22 and F23 2 Series, this driver’s side UK underfloor guard restores the smooth airflow BMW intended, shields the chassis from grit and spray, and helps keep noise and vibration down. It is a direct replacement original equipment component, built to BMW standards for accuracy and longevity.

If your existing belly pan or splash tray is cracked, missing or loose, this RH panel is the smart fix. We have installed this item on our own vehicles and many customer cars with excellent results. Owners consistently report improved underbody tidiness, fewer rattles and a cleaner, more protected floor section once fitted.

  • Original equipment right-hand lower cover for F2x platforms - exact fit, OE quality
  • Helps protect the floor and tunnel area from stones, water, salt and road grime
  • Restores smooth under-car airflow for better stability and reduced turbulence
  • Durable BMW material and finish for reliable long-term service
  • Ideal for repair, maintenance or restoration back to factory specification

Compatibility - Platforms and Engines

Fits the following BMW models on the UK offside (right-hand):

1 Series

  • F20 5-door hatch including LCI years
  • F21 3-door hatch including LCI years
  • Petrol and diesel variants including 114d, 116d, 116i, 118d, 118i, 120d, 120i, 125d, 125i, M135i and M140i, with rear-wheel drive and xDrive where applicable

2 Series

  • F22 Coupe including LCI years
  • F23 Convertible including LCI years
  • Including models such as 218d plus other petrol and diesel derivatives

Position: Right-hand side UK - offside. If you need help determining the correct side for your vehicle, contact us and we will confirm before you order.

Part Number

BMW OE: 51757241838

Order With Confidence

Send us your UK registration or the last 7 digits of your VIN and we will verify suitability before dispatch, ensuring you receive the correct RH underfloor panel for your exact specification.

Fitting and Support

Professional installation recommended. We offer fitting at MJ Modifications in Warwickshire. For a quote or advice, email info@mjmodifications.co.uk.

Manufacturer and Warranty

Manufacturer: BMW

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

Why choose OE

  • Correct shape and mount points for seamless installation
  • Engineered for BMW aerodynamics and NVH performance
  • Trusted by enthusiasts and our workshop team for quality and fit

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