hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
133,000 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2001 Toyota 4Runner drivetrain problems

drivetrain problem

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2001 Toyota 4Runner Owner Comments

problem #3

Aug 242014


  • 150,000 miles


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

problem #2

Aug 202012


  • 145,000 miles
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

problem #1

Aug 242011

4Runner 6-cyl

  • 104,000 miles
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

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