GoldenWrench BMW E90, E92 & E93 M3 BLACKLINE Washer Fluid Cap

Upgrade your engine bay with the GoldenWrench BLACKLINE Billet Washer Fluid Cap for BMW E90, E92 & E93 M3, designed to replace the factory plastic cap with a precision-engineered aluminium solution that enhances both quality and functionality. Developed in-house and CNC-machined from T6 aluminium, this full replacement cap features GoldenWrench’s no-spill seal technology to eliminate common washer fluid leakage while delivering a premium, high-end finish.

Key Features:

• Full replacement billet washer fluid cap
• CNC-machined from T6 aluminium for durability and precision
• BLACKLINE Performance design with premium anodised finish
• Integrated no-spill seal technology to prevent fluid leakage
• Precision 3D-milled detailing for a high-quality finish
• Direct replacement for factory cap
• Quick and simple installation

Premium Engine Bay Upgrade

The factory washer fluid cap is a basic plastic component that often looks out of place in a performance-focused engine bay. The GoldenWrench BLACKLINE cap replaces it with a machined aluminium upgrade that delivers a cleaner, more refined aesthetic in line with high-end BMW builds.

Advanced No-Spill Seal Technology

Designed to address a common issue with OEM caps, this upgraded unit incorporates a precision sealing system that:

• Prevents washer fluid leakage
• Improves sealing performance under movement and pressure
• Provides a more secure fit compared to factory components

CNC-Machined Billet Aluminium Construction

Each cap is manufactured from high-grade T6 aluminium using advanced CNC machining processes, ensuring:

• Exceptional strength and durability
• Consistent precision and fitment
• Long-lasting resistance to heat and engine bay conditions

The engraved detailing is 3D-milled directly into the cap, creating a premium finish that will not fade or wear over time.

OEM Fitment & Easy Installation

This is a complete replacement unit designed to install directly in place of the original cap within minutes, requiring no modifications.

What’s Included?

• GoldenWrench BLACKLINE Billet Washer Fluid Cap
• Installation instruction card

Compatibility

• BMW E90 / E91 / E92 / E93 3 Series (including M3)
• BMW G20 3 Series (excluding G80 M3)
• BMW X3 F97
• BMW X4 F98
• MINI F55 / F56 / F57

Why Choose GoldenWrench?

GoldenWrench is known for producing high-quality billet aluminium upgrades that combine precision engineering with functional improvements and premium finishes.

Why Buy from R44 Performance?

R44 Performance supplies carefully selected BMW upgrades designed to improve both performance and ownership experience.

• BMW specialists
• Premium aftermarket brands
• Fast UK and international delivery
• Expert support and product knowledge

Refine your engine bay with the GoldenWrench BLACKLINE Washer Fluid Cap, delivering improved sealing, premium materials and a noticeable upgrade over the factory component.

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.