Dynamic Friction 355-42021 brake master cylinder for the 2007-2017 Jeep Wrangler turns pedal force into hydraulic pressure for the brakes. As a 2007-2017 Jeep Wrangler master cylinder, it sends fluid on to the brake lines.
A soft or sinking brake pedal, a falling fluid level or fluid leaking at the cylinder can mean the master cylinder is wearing out. These signs alone do not prove it is the problem, since a leaking brake line can cause a soft pedal too. Have brake problems checked promptly.
This is a direct-fit brake master cylinder replacement for the 2007-2017 Jeep Wrangler.
Fit and size
Build and materials
This listing holds one brake master cylinder, and the 2007-2017 Jeep Wrangler takes one.
Is the Dynamic Friction 355-42021 the right cylinder for a 2007-2017 Jeep Wrangler with any engine?
Yes. Dynamic Friction 355-42021 fits the 2007-2017 Jeep Wrangler, and the engine does not change which master cylinder you need.
Does this Dynamic Friction brake master cylinder come with the reservoir?
Yes. The reservoir is included with Dynamic Friction brake master cylinder 355-42021, so the listing is one cylinder with its reservoir.
What is the bore size of this brake master cylinder?
The bore size is 1 inch.
How can I tell if a brake master cylinder is leaking?
With the engine off and cool, look for brake fluid on or around the cylinder body. A pedal that sinks or feels soft in normal driving can also be a sign, and a shop can test it.
Can I keep driving if the brake master cylinder is leaking?
No. A leaking or failing master cylinder affects braking, so have it checked or replaced promptly. A shop can confirm the cause.
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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.
