I purchased a 2005 Toyota Tacoma pickup w/ the 1 engine. Shortly afterwards, I noticed a noise coming from under the hood when I accelerate from a stop. The noise sounded like a knock or a small hole in the exhaust system. I returned the truck to the dealer, and provided the information. They said they couldn't hear a thing. (this was in phildelphia). When I returned home to new orleans after katrina, I took the truck to a Toyota dealer, who said it was an engine knock and nothing could be done about it. Over time the noise got louder and I took the truck to another dealer Toyota of slidell. Their technician took a ride with me and heard the noise himself, but indicated he found no problem when the truck was checked out. At a later date I returned to the dealer and reported the noise again and the technician stated that Toyota had a technical bulletin issued about the problem which was in one of the two exhaust manifolds on the engine. Both exhaust manifolds were replaced and the noise seemed to have been fixed. At a later date, I returned to the dealer and reported that the problem returned. The technician stated that they had completed everything the could based on Toyota's guidance. I requested that the exhaust manifolds be replaced again since it seemed that the problem was eliminated when the exhaust manifolds were replaced originally. He checked with the regional technical rep who said to go ahead and replace the equipment a second time, and this was done. The noise returned shortly thereafter. I returned to the dealer and reported the problem and they stated that nothing else could be done and provided me with the Toyota complaint hotline number. I called the number, was assigned a number and have been in touch with the representative. The are to send me some arbitration forms. I feel that I was sold a truck with a defect that will diminish the value of the vehicle when I either sell it myself or use it as a trade-in.

- Slidell, LA, USA

Exhaust poor engineering. The crossover pipe on the exhaust is the lowest point of the vehicle. It hangs down below the transfercase mount. This will get crushed if taken off road. I bought a 4 X 4 trd model for the sole purpose of taking it off-road. A crushed or damaged crossover pipe could result in carbon monoxide poisoning or even death. This should be recalled for this problem.

- Glens Falls, NY, USA