Genuine BMW & MINI Engine-Side Catalytic Converter | Primary Close-Coupled Front Cat | F40 M135i xDrive, F44 M235i xDrive, X1 F48 20i xDrive, X2 F39 M35i, MINI JCW ALL4 F54/F60 | OEM Part 18329470154

OEM Exhaust Catalyst - Engine side assembly for BMW F40 M135i xDrive, F44 M235i xDrive, X1 F48 20i xDrive, X2 F39 M35i and MINI JCW ALL4 F54 F60

Restore smooth running, factory refinement and clean tailpipe readings with this direct-fit front converter assembly positioned right by the turbocharger. This genuine BMW-MINI component replaces the primary near-turbo catalyst on selected 2.0 turbo petrol models, delivering the correct backpressure, fast light-up and reliable emissions control without compromise. Ideal when your original unit is tired, rattling or triggering catalyst efficiency faults, it is the straightforward way to get your car driving as it should while keeping the dashboard free of warning lights.

Fitted and proven by our own workshop, this unit aligns perfectly with the original hardware and oxygen sensors for a hassle-free install. Customers consistently report excellent build quality, precise fitment and a clear return to OEM drivability and refinement. If you are searching for a factory converter for M135i, a front section for M235i Gran Coupe, an X1 20i xDrive front converter, an X2 M35i primary catalyst or a MINI JCW ALL4 front emissions unit, this is the genuine answer.

Why this genuine front converter is the right choice

• Original equipment quality - built to BMW-MINI specifications for durability and perfect alignment
• Close to turbo location for rapid warm-up and stable lambda control
• Direct bolt-on replacement using factory brackets and sensor positions
• Great fix for rattle, sulphur smell, MOT emissions issues and catalyst efficiency faults
• Keeps drivability, cold-start manners and refinement just like stock
• Ideal for owners searching terms like front converter, primary catalyst, turbo outlet cat, downpipe with cat, OEM exhaust catalyst

Part number

BMW-MINI Part No. 18329470154 - also searched as 18 32 9 470 154

Vehicle applications

BMW

• 1 Series F40 - M135i xDrive (06/2018 to 12/2019)
• 2 Series F44 Gran Coupe - M235i xDrive (10/2018 to 12/2019)
• X1 F48 LCI - 20i xDrive (05/2018 to 12/2019)
• X2 F39 - M35i xDrive (10/2017 to 12/2019)

MINI

• Clubman F54 LCI - John Cooper Works ALL4 (05/2018 to 12/2019)
• Countryman F60 - John Cooper Works ALL4 (05/2018 to 12/2019)

Fitment notes

• Direct-fit primary converter located adjacent to the turbocharger
• Uses existing mounting points and OE oxygen sensor positions
• Suitable for the 2.0 turbo petrol applications listed - commonly searched as B48 front cat or B48 primary catalyst

Fitting and support

Professional installation recommended. For expert fitting, book with MJ Modifications in Warwickshire - request a quote at info@mjmodifications.co.uk. Not sure on compatibility? Email us your VIN and we will confirm before you order.

Warranty

Two years manufacturer warranty when a valid VIN is provided at checkout.

Popular search phrases

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