I just received the engine bay fuse box from a seller on eBay and it's nearly identical to the one on my Disco except for this so-called Mega Fuse and also lacking a pin hole on these smaller relays. There isn't a part number on it. Tried googling but coming up short. Did the early 99's come with a different fuse box than later Discos? I thought they were all the same in the engine bay.

 

The engine bay fuse box on my '99 looked like that, and it was different from the one in both my 2003 and 2004 trucks.

 

It also had the Mega Fuse? All I've seen just have the metal bar but none of that labeling.

 

Yes, it had exactly that same Mega fuse.

 

Interesting that it isn't more clear that the 1999s had a different box. I found another on eBay that was "pulled out of a 1999" that had the same box... though it's being sold, like all of them, as 1999-2004.

 

03-04 didn't have an actual "mega fuse". They came with a strip of metal which was rated for the same amperage. However you can simply replace the 03-04 strip with the mega fuse if you roast it.

 

My 2002 has just the plain metal strip too. Good to know they're swappable though!