aFe POWER Magnum FORCE Stage-2 Intake Airbox Cover for BMW N55 135i, 335i & X1 (E82/E88/E90/E92/E93/E84) – Part 54-31918-B – Fits aFe 52-31912

Genuine aFe Stage 2 Air Filter Housing Lid for BMW N55 E82 E88 E90 E92 E93 E84 - Part No. 54-31918-B - suits aFe kit 52-31912

Tidy your engine bay and enjoy a more refined induction note with this premium aFe housing lid, engineered to clip onto the aFe Stage 2 lower airbox. Constructed from tough vacuum-formed ABS with a smart riveted aFe badge, it delivers a clean OEM-plus finish while keeping airflow unobstructed and reducing unwanted intake roar. Ideal for daily-driven cars and fast-road builds that want performance without the extra cabin noise.

Why this airbox lid is a winner

• Designed to work specifically with the aFe Stage 2 lower box for the N55 turbo straight-six.
• Clips on in minutes using factory-style tabs and locations, no drilling or trimming required.
• Durable ABS construction resists heat and vibration for long-term reliability.
• Stealth black finish elevates the look of the bay and complements factory plastics.
• Real-world proven by us on shop cars and customer vehicles with excellent feedback on fit, finish and sound quality.

Part numbers

• aFe part number: 54-31918-B
• Compatible intake system: aFe Stage 2 kit 52-31912

Applications

For E-series BMW models running the N55 3.0 petrol turbo engine and the aFe Stage 2 intake base:

• BMW 135i E82 coupe and E88 convertible 2011 to 2013
• BMW 335i E90 saloon 2011
• BMW 335i E92 coupe and E93 cabriolet 2011 to 2013
• BMW 335i xDrive E90 E92 E93 2011 to 2013
• BMW X1 E84 N55 2013 to 2015

Fitment note: This lid only fits the aFe Stage 2 lower airbox base 52-31912. It is not a replacement for the factory airbox top on its own.

Spec highlights

• Material: vacuum-formed ABS plastic
• Finish: textured black with metal aFe emblem
• Function: quietens induction sound while retaining flow from the open-element filter
• Install: tool-free clip-on design using OE-style points

Installation and fitting support

Home install is straightforward thanks to the clip-on design. Prefer professional fitting or a same-day service? Book in with MJ Modifications in Warwickshire. Request a fitting quote via info@mjmodifications.co.uk.

Compatibility check

For peace of mind we can verify fitment before dispatch. Add your UK registration or last 7 of the VIN at checkout and our team will confirm this lid matches your E-series N55 with the correct aFe Stage 2 base.

Warranty

Backed by a one year aFe warranty.

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