Horn Assembly problems of the 2005 Toyota Tundra

My truck has 2 parts that have gone bad, the air injection pumps and air switching valves. Toyota issued a warranty policy bulletin regarding these parts on Tundra models 2007-2010 and 2008-2010 sequoia models. My 2005 Tundra was not included in this customer support program. However, my truck has the same part that is on the 2007-2010 Tundras and has malfunctioned. This is an issue that Toyota has been aware of and that was the reason for the warranty enhancement for these parts on the 2007-2010 Tundras. Toyota has refused to include the 2005 models in the same customer support program to replace these defective parts, they have said they would pay only half of the costs to replace them. If its the same part as the 2007-2010 that Toyota knows were defective, then why not include all model Tundras and sequoias that have these parts? the warranty enhancement was extended to 10 years/150,000 miles. My 2005 has approximately 121,000 miles and was checked by my local dealership whom reported the problem to me and stated what the defective parts were and they also gave me the information regarding the customer support program(ztq). Please give feedback to whatever you may find out. Thank you, jeff sinkhorn.

The engine shut off while I was driving on the road and making a left turn. I realized the engine shut off when I pressed down on the accelerator and nothing happened. The radio was still on the headlight and horn worked. I switched the battery out with a new one. The engine would still not start. I would turn the key and only the radio would turn on. No noise or response from the engine could be heard with old and new battery. Vehicle was towed to Toyota dealer, they replaced what they said was a blown out ignition fuse. As I drove out of the parking lot from the Toyota dealer the engine shut off again exactly how it had occurred before. I was less than one block from the dealer when this happened. It is currently at the Toyota dealer.