Description
Product Overview
The kweiny brake fluid cap is engineered from high‑quality aluminum alloy with a blue anodized exterior finish. Measuring just 2 x 2 x 0.6 inches and weighing only 0.03 kilograms, this compact component offers a perfect match for the brake master cylinder reservoir on a variety of Ford trucks and SUVs. Its integrated molding design eliminates the need for separate seals, providing a leak‑proof barrier that resists corrosion and wear. The cap carries OEM part numbers 42046 and BRFC‑4, ensuring direct compatibility with factory specifications.
Usage
Designed for the brake master cylinder reservoir, this cap is ideal for routine maintenance, brake fluid replacement, and long‑term service intervals. It fits Ford F‑150 (1997‑2004, 2009‑2013), Super Duty series (1999‑2016), E‑Series vans, Expedition (1997‑2017), Explorer (1991‑2005) and other related models. Before removal, clean the filler opening to avoid contaminating the brake fluid. Install the cap by aligning the threads and pressing firmly until it seats securely, providing a reliable seal in all driving conditions.

Why Choose Us
Our brake fluid cap stands out due to its precision‑engineered aluminum construction, which offers superior strength compared to standard plastic caps. The anodized blue finish not only adds a visual cue for correct installation but also protects against rust and chemical exposure. Each cap undergoes rigorous quality testing to meet OEM standards, guaranteeing a fit that matches the original part number and performance expectations. With a 4.2‑star rating from 32 verified customers, you can trust its durability and ease of use.
Key Features
- Aluminum alloy body with blue anodized coating for corrosion resistance
- Exact OEM fit for multiple Ford models, eliminating guesswork
- Integrated molding eliminates separate seals, ensuring a leak‑proof seal
- Lightweight design (0.03 kg) for easy handling and installation
- Meets or exceeds OEM part numbers 42046 and BRFC‑4 specifications
FAQ
Is this cap compatible with my 2010 Ford F‑150?
Yes, the cap is listed for Ford F‑150 model years 2009‑2013, providing a direct replacement for the original plastic cap.
Do I need any special tools to install the cap?
No special tools are required. Simply align the threads and press the cap onto the reservoir until it seats securely.
Can I use this cap on non‑Ford vehicles?
The cap is specifically engineered for the listed Ford models. Using it on other makes may result in an improper fit.
What does the blue anodized finish indicate?
The blue anodized coating protects the aluminum from corrosion and provides a visual cue to ensure correct orientation during installation.
Is the cap reusable after removal?
Yes, the aluminum construction allows the cap to be removed and reinstalled multiple times without degradation, provided it is kept clean and free of debris.






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