Can anyone tell me why my 2007 XLE does not have heated seats like the rest of the 2007 XLE trims do?

 

Heated seats appear to have been an option for XLE.

 

How cheap would it be to add the OEM heated seat equipment to my 07 XLE?

 

Don't know cost of OEM add on. Go to a Toyota parts site and find the OEM heater parts for a price. The OEM units do fail. The internet has video's on replacement which can be used to install a new system assuming the seat unit is the same.

The OEM warmer goes under the seat cover and typically has two separate heater units beside each other. As recall there may be a occupant pressure switch to activate the unit. Will then need to wire the car to plug in the warmer.

Does the seat have a built-in airbag? Airbag wiring would be separate (yellow colored).

If the air temps are real cold the warmer may be a little weak.

Dorman sells an aftermarket unit for approx $35 on Amazon. Might consider this.