• NRW Billet Oil Cap
  • NRW Billet Oil Cap
  • NRW Billet Oil Cap
  • NRW Billet Oil Cap
  • NRW Billet Oil Cap
  • NRW Billet Oil Cap

NRW Billet Oil Cap

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$99.95
$99.95
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For nearly two decades, BMW enthusiasts have dealt with the same frustrating issue: a factory oil cap design that has been prone to seeping and leaving oil residue across the valve cover. From the E46 and E9X platforms through the F8X generation, this has remained a common complaint.

The issue became even more apparent to NRW Design after introducing the world’s first aftermarket aluminum S65 valve cover. Customers would occasionally report what appeared to be a leaking valve cover, only for the oil to actually be originating from the factory oil cap. Even brand-new genuine BMW oil caps didn’t solve it.

NRW’s first solution was the Ultimate Oil Cap, a multi-piece billet assembly with a threaded funnel attachment and an optional -10 ORB port. Many enthusiasts simply wanted a reliable, OEM-style replacement without the added complexity.

The result is this single-piece billet aluminum oil cap, precision machined from 6061 aluminum and designed to deliver what the factory cap never could: a leak-free seal, OEM+ appearance, and long-term durability. It retains a clean, period-correct look while permanently addressing one of BMW’s longest-standing annoyances.

This billet oil cap is included with every NRW Design valve cover, and is available here separately for BMW owners who want to upgrade their factory cap.

NRW Billet Oil Cap

$99.95

Does it come with a warranty?

Parts are covered by the manufacturer's warranty where one is offered. If something goes wrong, contact us and we'll help you with the claim.

What happens if I don't like it?

New, uninstalled parts in their original packaging can be returned within 30 days of delivery. Suspension components (coilovers, springs and dampers), wheel spacers and batteries can't be returned, and a restocking fee applies to approved returns. See our refund policy for details.

How fast is shipping?

In-stock orders usually ship within 1–3 business days. Many parts ship directly from the manufacturer or distributor. Orders over $200 ship free with standard shipping, and faster UPS and USPS options are available at checkout. See our shipping policy.

What's the returns policy?

You have 30 days after receiving your item to request a return. Parts must be new, uninstalled and in their original packaging. Contact us first to start a return. Full details are in our refund policy.

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