Thanks CJ,

That site shows that I should've got 2 4162s. I ended up getting a 3153 and a 4162. Brian wasn't quite positive, though pretty sure about the 4162s, and I took a gamble based on the Toyota parts counter guy insisting that they were different. Oh well, I'm a dick on this one. Hopefully URD will let me swap it for the right one. At least I should be able to pass inspection next week with the front sensor only.

'86 4 X 4 Hilux (sold)
'97 T-100 4 X 4 SR5
'05 Tacoma 4 X 4 TRD Sport DBL Cab LB