The contact owns a 2001 Toyota 4runner. While the contact was at an independent mechanic for a muffler replacement, he was informed that the vehicle frame was severely rusted. The mechanic stated that the muffler could not be replaced and a leak was present. The dealer (mcgee Toyota of hanover, 860 Washington St, hanover, MA 02339, (866) 942-1756) informed the contact that the frame and differential housing needed to be replaced. The differential housing was repaired, but the frame was not. The manufacturer was made aware of the failures. The failure mileage was 170,000.

- Scituate, MA, USA

The contact owns a 2001 Toyota 4runner. The contact stated that the differential housing corroded and caused fluid to leak. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 150,000.

- Holland, MI, USA

My vehicle has very little rust except for the rear differential. Large flakes of rust have formed. The differential recently began leaking. After searching online I see this is a common problem with 4runners.

- Elmira, MI, USA

Rear differential housing rusted through. The housing cover is a thinner metal than the differntial axle and is not replaceable. Oil leaks out through the rusted cover until oil is depleted and could cause drivetrain failure while operating the vehicle. Dealer said they will do nothing to help. This is an item that should never fail on a vehicle. My vehicle has absolutely no body rust, yet this part fails due to rust! this is unacceptable and Toyota should step up and take care of the issue. Obviously there are numerous complaints on this site and many more on the internet forums. Toyota loses much respect if they do not address this issue.

- Union City, PA, USA