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BMW

Genuine BMW N54 PCV/CCV Crankcase Vent Hose - Valve Cover Breather Pipe / Rocker Cover Vent Tube - Oil Separator Vapor Line / Blow-by Return Hose - E60 E61 E82 E88 E89 E90 E91 E92 E93 - 135i 1M 335i 335xi 335is 535i 535xi Z4 35i 35is - OEM 11157553949

Genuine BMW N54 PCV/CCV Crankcase Vent Hose - Valve Cover Breather Pipe / Rocker Cover Vent Tube - Oil Separator Vapor Line / Blow-by Return Hose - E60 E61 E82 E88 E89 E90 E91 E92 E93 - 135i 1M 335i 335xi 335is 535i 535xi Z4 35i 35is - OEM 11157553949

£36.94
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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.

Restore leak‑free crankcase control on your N54

Keep your twin‑turbo straight‑six breathing properly with this Genuine BMW breather line for the N54 engine, part number 11157553949. This factory vapour hose links the cam cover to the intake system to manage blow‑by gases, helping prevent vacuum leaks, oil odour in the cabin, uneven idle and lost performance on 35i models.

We have installed this hose on customer cars and our own builds at MJ Modifications with excellent results. Owners report smoother running, stable fuel trims and the reassurance of an airtight ventilation system using an OEM BMW component.

Why this OEM breather line is the smart choice

  • Genuine BMW part for perfect fit and longevity
  • Direct replacement vapour return tube for N54 turbo applications
  • Addresses common issues from brittle plastic elbows and cracked hoses
  • Helps eliminate oil smell, hesitation and hunting idle caused by leaks
  • Built to withstand heat, boost and under‑bonnet vibration
  • Ideal preventative maintenance on ageing N54s and tuned cars

Part number

11157553949 (also seen as 11 15 7 553 949)

Vehicle applications

1 Series

  • E82 Coupe: 135i, 1M
  • E88 Convertible: 135i

3 Series

  • E90 Saloon: 335i, 335xi
  • E91 Touring: 335i, 335xi
  • E92 Coupe: 335i, 335xi, 335is
  • E93 Convertible: 335i, 335is

5 Series

  • E60 Saloon: 535i, 535xi
  • E61 Touring: 535xi

Z Series

  • E89 Z4: sDrive35i, sDrive35is

Pre‑dispatch fitment check

We confirm compatibility before shipping. Add your UK registration or the last 7 of your VIN at checkout so we can verify this OEM vent tube suits your vehicle.

Installation

Professional fitting recommended. MJ Modifications, based in Warwickshire, can install this part for you. Request a quote at info@mjmodifications.co.uk.

Warranty

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

Helpful notes

  • Great time to inspect the valve cover grommets, PCV valve and intake connections
  • Replacing aged ventilation lines can remove small boost and vacuum leaks
  • Recommended on higher‑mileage 35i engines and remapped cars

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