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Knox Trailers · Electrical & Lighting
MSW-5388
In stock · ships from Knoxville
This is an engine brake switch for Mack trucks. It controls the engine compression brake (often called a Jake brake), allowing the driver to activate engine braking to slow the vehicle without using the service brakes.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
When the switch fails, the engine brake may not engage or may work intermittently, so it is replaced to restore proper operation.
Part Number: MSW-5388
BRAKE SWITCH, MAK1MR3529
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside electrical & lighting
