Serpentine belt tensioner part number?

[freeflight]

Need to replace the serpentine belt tensioner for my 04 4Runner V6. Found two part number online: 1662031011 vs 1662031012. Which one is the correct part number?

Thanks.

1662031012
2004 Toyota 4Runner Belts and Cooling Accessory Drive Belt System Components parts - OEM Toyota Parts

1662031011
2004 Toyota 4Runner Belts and Cooling Accessory Drive Belt System Components parts - OEM Toyota Parts

 

[AKmoney]

Can't help you directly since I have a V8 but I recommend you pull off the existing tensioner(s) and bring them with you to a nearby dealer or auto parts store. In my experience the part numbers loaded into the dealers/parts shop's systems didn't match physical reality, so having the old part with you will be immensely helpful when you get to the parts counter.