One problem related to engine failure has been reported for the 1997 Toyota 4Runner. The most recently reported issues are listed below.
I have maintained the 4 runner's records since my purchase new in 12/96. They claim I did not change oil for a long time and caused engine sludge. Mechanic said it is very similar to settlement below. Toyota oil sludge faced with a consumer revolt over low mileage engine failures caused by oil sludge buildup, Toyota has begun to notify 3. 3 million owners of 1997-2002 Toyota and Lexus vehicles with 3. 0-liter imz v-6 engines and all 1997-2001 Toyota vehicles with 5sfe 2. 2-liter 4-cylinder engines that it will cover the cost of sludge-related repairs for eight years from date of initial sale. Whether this will satisfy the thousands of Toyota and Lexus owners who have already suffered engine failure remains to be seen because Toyota's special policy falls short of an express warranty. Toyota modified v-6 engines made after July 2001 but has not recalled the earlier engines. The 2. 2l 4-cylinder has been dropped.