Replace ignition key by 100,000 miles on Toyota 4Runner

By 100,000 miles the ignition key tends to wear out and should be replaced or it may not work as well in the door locks or ignition lock cylinder.
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Average mileage: 137,464 (10,000–184,324)
7 model years affected: 1990, 1991, 1992, 1993, more1994, 1999, 2006
11 people reported this problem
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problem details
1994 Toyota 4Runner 184,324 mi,
noticed that my key only works on the passenger side door and my ignition can get annoying
1999 Toyota 4Runner 178,000 mi,
Can not turn the key to the right. Replaced key cylinder.
2006 Toyota 4Runner 10,000 mi,
Starter switch lockedup
1999 Toyota 4Runner 145,000 mi,
Engine key only sometimes will start the car, and sometimes turning it off won't stop the engine (keeps sounding like it's trying to start). Battery has been replaced and still does it.