I have had one oxygen sensor replaced within the past year at an expense of over $400. I now have another oxygen sensor failure and note that many others are experiencing the same manufacturer defect. My truck has only 52,000 miles but it is beyond the extended warranty period granted by Toyota. It is obvious that Toyota should recall all 2000 Tundra and fix them rather than extend a warranty.

- Fairfax Station, VA, USA

Oxygen sensors constantly fail. I have replaced twice and another is currently out. Toyota extended the warranty instead of recalling and fixing the problem. The second O2 sensor was out within the extended warranty period but I didn't fix B/C I already had it repaired once. Of 3, I was reimbursed for 1.

- Pinson, AL, USA

Brake rotors have needed replacing several times since new because they warp. Poor design flaw. O2 sensor replaced under warranty at close to 58K miles, then 2 more O2 sensors went out @ 103K miles. Very expensive to replace... cost me $435. I have complained to 2 different dealers that my front left wheel may have a bad wheel bearing, but they say they can't find anything wrong. All I know is it constantly squeaks and it has nothing to do with the brakes because the noise does not change when you apply the brakes or drive along down the road at slow or highway speeds.

- Gaston, SC, USA

68800 mi. Check engine light on. Dealer said exhaust manifold and gasket were leaking. It and both O2 sensors needed to be replaced. One O2 sensor had been replaced less than 12 months before - now both!. technician said they'd fixed 5 or 6 exact same problems within the last month - at one dealership!. another web site indicates others are having the same problem. I smell mfgr defect that should be covered 100% as it's emissions oriented and because problem seems to be wide spread. It's possible to design and build a manifold that doesn't leak or warp. Toyota should own up and fix at their expense. Unconscionable if they don't, and need NHTSA to make them.

- Franktown, VA, USA

2000 Toyota Tundra SR5 4WD repeated failures of O2 sensors, have two sensors fail within 30,000 miles total on the truck. Expensive repairs. On Jan 13 2004, Toyota repair stated it could cost $800 to repair O2 sensor in exhaust manifold because "around half" of them won't come out and the entire manifold must be replaced. I know two people personally with the same exact failures on this year truck.

- Snohomish, WA, USA

In Sept of 2003, I had to have one of my 02 sensors replaced on my 2000 Tundra with 42,000 miles on it. Less then four months later I am having another 02 sensor replaced at 48,000 miles. One of my co-workers has a 2000 Tundra also and has two 02 sensors replaced. I feel that it is more than apparent that there is a quality issue with these sensors and Toyota should re-call and replace the lot of them.

- Virginia Beach, VA, USA

Bad O2 sensors on 2000 Toyota Tundra access cab 4-wheel drive.

- North Richland Hills, TX, USA