Mine is on the crossmember just forward of the gastank.
That's what I was hoping. Someone at Jiffy Lube told me it was in the tank and they were "positive", but I thought I had seen it underneath almost directly below the cab. I know it is in the tank in some Nissan's but didn't think it was in mine. Strangely, I can't seem to get a straight answer anywhere on the Internet either. Thank you.
Search Nissan Frontier Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Nissan Frontier Experts