Genuine BMW Front Lower Air Guide / Bumper Air Duct Undertray Deflector - F20 F21 F22 F23 1 Series 2 Series - Left or Right (NS/OS) OEM Replacement - Radiator Cooling Air Scoop - M135i 114d-125d 118i 218d - PN 51718052651 51718052652

Factory Air Guide Trim for BMW F20 F21 F22 F23 1 Series and 2 Series

Restore the front end of your BMW with a genuine lower air guide that matches the original finish and fit. This side-specific front underbody aero piece replaces tired or missing trim to keep cooling airflow and front bumper alignment just as Munich intended. Choose the exact side you need and enjoy a precise, direct-fit solution with authentic BMW quality.

We have installed these air guides in-house and supplied them to many happy customers. Fitment is spot on, the profile lines up perfectly with the bumper and undertray, and the robust OE plastic resists road debris and weather. Ideal for daily-driven cars and enthusiast builds where correct airflow management and factory appearance matter.

Why this genuine BMW air guide

• Authentic BMW part for perfect alignment and factory finish
• Direct bolt-on replacement using original mounting points and clips
• Sold individually so you can select the required side
• Restores lower bumper airflow, cooling efficiency and neat undertray look
• Trusted by MJ Modifications and our customers for reliability and fit

Part numbers

• 51718052651 Left side air guide UK nearside passenger
• 51718052652 Right side air guide UK offside driver

Vehicle coverage

BMW 1 Series

• F20 07/2010 to 02/2015
  • 114d, 114i, 116d, 116i, 118d, 118dx, 118i, 120dx, 125d, 125i, M135i, M135ix
• F21 07/2010 to 02/2015
  • 114d, 114i, 116d, 116i, 118d, 118dx, 118i, 120dx, 125d, 125i, M135i, M135ix

BMW 2 Series

• F22 LCI 09/2016 to 12/2019
  • 218d
• F23 LCI 11/2016 to 12/2019
  • 218d

Fitting and installation

Professional installation recommended for best results. Book fitting at MJ Modifications, Warwickshire request a quote at info@mjmodifications.co.uk.

Compatibility check

For a guaranteed match, provide your UK registration or the last 7 of your VIN at checkout and we will confirm the correct side-specific part before dispatch.

Manufactured by

BMW

Warranty

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

Search-friendly terms customers use

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