Replace ignition key by 100,000 miles on Toyota Pickup

Our technicians report that 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: 162,000 (105,000–228,000)
5 model years affected: 1990, 1991, 1992, 1993, more1994
10 people reported this problem
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Viewing 1 - 3 of 3 problem details
The original key for the truck doesn't work very well you have to shake it to open and start engine. No need for expensive dealership replacement, go to a locksmith shop and have them make a copy of the key but ask them to raise the machine a fraction of an inch. This works and made a key that works great and you can make normal copies of this new key.
1991 Toyota Pickup 228,000 mi,
Ignition is wearing out. Needs to get replaced soon.
1994 Toyota Pickup 153,000 mi,
Ignition key wears out, but when replaced with newer key -- won't work in ignition. Must replace entire ignition?