Details From NHTSA:
Potential Number of Units Affected: 44,121
Problem Description: Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2018-2019 Toyota Tacoma vehicles. Improper machining of the brake master cylinder may result in internal damage of one of the seals, affecting brake performance.
Consequence: Reduced brake performance can lengthen the distance needed to stop the vehicle, increasing the risk of a crash.
Remedy: Toyota will notify owners, and dealers will replace the brake master cylinder, free of charge. The recall is expected to begin January 21, 2019. Owners may contact Toyota customer service at 1-888-270-9371. Toyota’s numbers for this recall are J16/J06.
Additional details from Toyota:
The part supplier reported that their testing had identified multiple improper processes that were completed at the U.S. machining facility.
When some combination of these improper processes at the U.S. machining facility are applied to non-concentric castings from the supplier casting facility in Japan, there is a possibility of producing master cylinders with edges at the channel of the bore with varying levels of incorrect chamfer. It was also determined that the creation of an edge with an incorrect chamfer would only occur on parts cast in the supplier’s Japan facility and machined at the supplier’s U.S. facility, because the machining processes used at the Japan machining facility account for varying levels of concentricity that exists on the cast parts from the Japan casting facility as a result of the mold design.
See more brake recall news here.