Seal the master cylinder cap and keep brake fluid protected with the Dorman - HELP Brake Master Cylinder Reservoir Cap Gasket 42072. This gasket seats under the reservoir cap to seal the master cylinder opening, helping keep brake fluid in and moisture and road grit out. It drops in as a direct-fit replacement across a wide range of GM vehicles, including the 1987-2005 Buick Century, 2008-2017 Buick Enclave, 1994-2005 Cadillac DeVille, 2002-2019 Cadillac Escalade, and 2000-2008 Chevrolet Impala — with 147 applications total, so see the Buyer's Guide tab for the full list.
- Cap seal: sits between the reservoir cap and the reservoir to seal the master cylinder opening.
- Contamination barrier: helps keep moisture and debris out of the brake fluid.
- Direct-fit: designed to replace the original gasket on the listed applications.
- Smart service part: an inexpensive piece to renew whenever you inspect or service the master cylinder cap.
Brake fluid is hygroscopic, so a properly sealing cap gasket helps limit moisture absorption over time. If a cracked, swollen, or hardened original gasket is weeping fluid or letting contaminants in, this replaces it.
Interchange: 18014091 · 18017123 · 18017209 · 18021306 · 18060186 · 18060795 · 420724 · 18013963 · Manufacturer part number 42072
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this gasket do?
It seats under the master cylinder reservoir cap and seals the reservoir opening, helping keep brake fluid in while keeping moisture and debris out.
Will this fit my vehicle?
It's cataloged as a direct-fit replacement for 147 GM applications, including many Buick, Cadillac, Chevrolet and GMC models. Check the Buyer's Guide tab to confirm your exact year, make and model.
When might I need to replace it?
Signs the gasket may need replacing include a cracked, swollen, hardened or distorted original, or fluid weeping around the reservoir cap. Diagnose the cause before replacing.
Is it sold individually?
This listing is for the reservoir cap gasket as described. Order the quantity needed for your service.
What part numbers does this replace?
It interchanges with 18014091, 18017123, 18017209, 18021306, 18060186, 18060795, 420724 and 18013963. Its own manufacturer part number is 42072.
Write a Review