Dorman - HELP Brake Master Cylinder Reservoir Cap P/N:42042
Keep your brake fluid clean and sealed with the Dorman - HELP Brake Master Cylinder Reservoir Cap (P/N 42053). This cap closes off the master cylinder reservoir, retaining the brake fluid while helping keep out dirt, debris and moisture that can contaminate the hydraulic system. It drops in as a direct replacement designed to match the fit and function of the original cap on the listed applications — a straightforward fix if your factory cap is cracked, worn, or missing.
Direct replacement: engineered to drop in like the original cap on the specified vehicles.
Restores sealing: a reliable stand-in when the original cap has gone missing or worn out from age and use.
Durable construction: made from quality materials for dependable performance and long service life.
Trusted support: backed by a team of product experts in the United States and more than a century of automotive experience.
Fits a wide range of Chrysler, Dodge, Jeep, Plymouth, RAM and SRT models, including the 2011-2014 Chrysler 200, 2006-2019 Chrysler 300, 1996-2016 Chrysler Town & Country, 1996-2018 Dodge Grand Caravan, 1999-2015 Jeep Grand Cherokee and 1997-2017 Jeep Wrangler. See the Buyer's Guide tab for the full list of applications.
Interchange: 04683656AB · 05014518AA · 4683656 · 68398161AA
This part cross-references / interchanges with the following part numbers:
What does this cap do?
It closes and seals the brake master cylinder fluid reservoir, retaining the brake fluid while helping keep dirt, debris and moisture out of the hydraulic system.
Is this a direct replacement?
Yes. It is designed to match the fit and function of the original cap on the specified vehicles, so it installs in place of the factory cap.
How do I know it fits my vehicle?
It fits many Chrysler, Dodge, Jeep, Plymouth, RAM and SRT models. Check the Buyer's Guide tab against your year, make and model for the full application list.
When should I replace the master cylinder cap?
Consider replacing it if the original cap is cracked, worn, missing, or no longer sealing properly. If a bad cap is the cause of contamination or leakage, this replaces it.
What numbers does this cap cross-reference?
It interchanges with 04683656AB, 05014518AA, 4683656 and 68398161AA.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.