Not at all...AMM = Air Mass Meter. It is the part with a wiring harness between the air cleaner box and the throttle body.

The reason I mention having a spare is that this is an item that will some day fail, is difficult to diagnose (sometimes) when it is an intermittent problem, and costs WAY too much when you need it right now because you are stranded. My guestimate is that they usually last at least 150K-200K miles so having a spare "known good" unit is cheap insurance.

If yours is an LH 3.1 model, the AMM is particularly rare used so you will need one in advance of your existing one failing. Used AMM range from $25-150 in the US depending on if you pull it from the salvage yard to buying on Ebay for the rarer LH 3.1 model.