Genuine Honda Product
Direct Factory Replacement Part
Fits Multiple Different Honda/Acura Chassis
Seals Brake Fluid from Debris and Moisture

Description
Vehicle Fitment
Included

Honda Brake Master Cylinder Reservoir Cap – Genuine OEM Replacement

This Honda Brake Master Cylinder Reservoir Cap (part number 46662-S04-J01) is the real-deal OEM Honda brake reservoir cap you want when your original one is cracked, faded, or not sealing like it should. A loose or damaged Honda brake cap lets moisture and dirt into the fluid, which means spongy pedal feel, rusty internals, and a brake system you can’t fully trust. Swapping in a fresh OEM Honda reservoir cap is cheap insurance for consistent braking and long-term reliability.

This Honda master cylinder cap matches factory specs for fit, venting, and material, so it clicks on and seals like the original. It keeps dirt, dust, and moisture out of the system while letting the brake fluid expand and contract correctly, so your hydraulic pressure stays stable. Whether you’re freshening a high-mile daily, doing an OEM+ restoration, or just knocking out routine maintenance, this Honda brake cap replacement brings the engine bay back to proper Honda spec.

This Acura/Honda brake reservoir cover fits a wide range of Honda and Acura models, from older Accords and Civics to Acura TL and CR‑V. If your existing Acura brake system cap looks chalky, cracked, or the seal’s flattened, it’s time. Use this Honda OEM brake reservoir cap when you bleed your brakes, swap calipers, or restore an old chassis, and you’ll know the top of the system is sealed the way Honda intended.

Key Features
- Genuine OEM Honda brake reservoir cap / master cylinder cap
- Properly seals the reservoir to help keep brake fluid clean and dry
- Maintains stable brake system function and hydraulic pressure
- Direct-fit Honda brake cap replacement for worn, cracked, or missing caps
- Perfect for maintenance, brake overhauls, and OEM-style restorations
- Easy OEM Honda cap purchase for anyone doing a Honda or Acura brake refresh
Part Number
- 46662-S04-J01 (Honda / Acura brake reservoir cover)
Vehicle Compatibility
- 1998–2003 Acura CL (Acura brake reservoir cover)
- 1997–2001 Acura Integra
- 1997–2001 Acura Integra Type R
- 1997–2003 Acura TL (Acura TL reservoir cap)
- 1980–1985 Honda Accord
- 1998–2002 Honda Accord (Honda Accord brake cap)
- 1980–2000 Honda Civic (Civic brake reservoir cap)
- 1997–2001 Honda CR-V (Honda CR-V brake cover)
- 1984–1991 Honda CRX
- 1993–1997 Honda Del Sol
- 1998 Honda Odyssey
- 1979–1985 Honda Prelude
- 1997–2001 Honda Prelude
If you’re already bleeding brakes, swapping lines, or refreshing an old Honda or Acura chassis, don’t reuse a sketchy old cap. This 46662-S04-J01 OEM Honda reservoir cover is a small, inexpensive part that protects your brake fluid and helps keep pedal feel firm and predictable. When you’re ready to buy a Honda brake reservoir cap or need an OEM Honda reservoir cover that just fits and works, this is the one to buy and forget about.
1998–2003 Acura CL
1997–2001 Acura Integra
1997–2001 Acura Integra Type R
1997–2003 Acura TL
1980–1985 Honda Accord
1998–2002 Honda Accord
1980–2000 Honda Civic
1997–2001 Honda CR-V
1984–1991 Honda CRX
1993–1997 Honda Del Sol
1998 Honda Odyssey
1979–1985 Honda Prelude
1997–2001 Honda Prelude
(1) Brake Reservoir Cap

Accord 1998-2002 Brakes