I am planning on replacing 3 of the backup sensors as they are malfunctioning.
The part number for 2000 Excursion is
YL1Z15K859AA and are 130 each
The 2001-2005 excursion part number is
1L1Z-15K859-AA and is around the same price
The 2003-2005 part number is
4F23-15K859-AA and are only about 20 dollars each.
What is the difference between them? Could I use the 2003-2005 version on my 2000?

 

I bought 4 off eBay for $30 total.

Had to use a knife and shave a small tang off them so they fit But other then that they function as expected.

 

Mind sending the link that you bought? So the only difference is the casing which can be altered easily?

 

How do you tell when one is malfunctioning?
If the 4F23-15K859-AA works they are about $9/ea on ebay or Amazon (4/$33).

 

you can tell by the clicking noise

 

Purchased years ago off eBay so no current link.
Just search "Excursion back up sensor"

 

There is also a 3F2Z-15K859-BA sensor for the 2003-2005 Excursion.
A 4 pack of the latest no. 4F23-15K859-AA is $26.
Does anyone know if these are all basically interchangeable after the minor tang trim?

 

This is what I want to know also

 

I believe, guess, the diff part #s per year have to do with whether the bumper is chromed or body color matched as the mounting/size is different.
The inner vs outer are also different sensor patterns, I think if you look at them the sensor is different, although they might fit in any spot.

 

So the inner and outer are not interchangable? so there is nothing different wiring wise from any of the years?