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RB

RB (Rob Beck) BMW N54 Valve Cover/Rocker Cover PCV Port Breather Cap Plug, Threaded Screw-In w/ O-Ring – Crankcase Service Cap – Fits 1M, 135i E82, 335i E90/E91/E92/E93, 535i E60/E61, Z4 35i E89

RB (Rob Beck) BMW N54 Valve Cover/Rocker Cover PCV Port Breather Cap Plug, Threaded Screw-In w/ O-Ring – Crankcase Service Cap – Fits 1M, 135i E82, 335i E90/E91/E92/E93, 535i E60/E61, Z4 35i E89

£53.45
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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.

Rob Beck N54 Rocker Cover Breather Cap with O-Ring

Secure your N54 crankcase system with the RB threaded breather cap. This direct-fit, screw-in replacement for the fragile factory plastic piece delivers a tight, dependable seal on the N54 rocker cover PCV port, helping to prevent boost leaks and oil misting while keeping your positive crankcase ventilation system working as it should. A fresh O-ring is pre-installed for a clean, airtight fit.

We use this part on our own builds and for customer cars, and feedback has been excellent. It is a simple reliability upgrade that saves you from replacing an entire valve cover just because the original cap has cracked.

Key benefits

  • Thread-in cap for the N54 rocker cover PCV/breather port with included O-ring for a leak-free seal
  • Tough construction that resists heat cycles and will not fracture like the OEM plastic plug can
  • Helps reduce vacuum leaks, rough idle and oil vapour issues caused by a failed stock cap
  • Ideal partner for the RB upgraded PCV check valve for a complete N54 crankcase solution
  • Cost-effective fix that avoids buying a full rocker cover only to replace the cap
  • Quick, easy install for DIY or professional fitting

Fitment

Compatible with BMW models powered by the N54 twin turbo engine, including:

  • BMW 1M Coupe
  • BMW 135i E82
  • BMW 335i E90, E91, E92, E93
  • BMW 535i E60, E61
  • BMW Z4 sDrive35i E89

Suits all N54 engines.

Installation notes

  • Supplied with a new O-ring. Lightly oil the O-ring before fitting
  • Thread in by hand and do not over-tighten to protect the rocker cover

Compatibility check

To ensure the correct part for your car, add your UK registration or the last 7 of your VIN at checkout and we will confirm fitment before dispatch.

Professional fitting

Installation available at MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk

Part number

E-N54-PCVS-RB

Manufacturer

Rob Beck (RB)

Warranty

Rob Beck does not offer warranty on this item.

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