Originally Posted by Soular

Hey there this is the unit they called an IDPM... its just a modular fuse box. this is on the right side of the car under the battery cover in the same hole as the battery. This unit is inside a black box of its own..

This the location of the box in the 2door coupe.. not sure about the 4 door version of the car. You have to get the right one.. meaning that the coupe's IPDM is not interchangeable with the 4 door.I also think its best to get one that is the same year as your car. So for example I have a 2005 G35 Sport Manual so that was the box I looked for.

I found a replacement on Ebay

https://www.ebay.com/p/5011613042

Ebay search for Coupe IPDM

Just got to ebay and enter your cars year and type and you will see various junkyard offering the part. $180 is what I a seeing.
When I got mine it was like 95$ to 130$ at the time... looks like prices have gone up...(greedy junkyards)

If water is getting in your battery box you have to mitigate that. make sure you IPDM is in that black box and that box has its top.
Also make sure you have the battery hole cover on ans make sure the area on the windscreen has all that plastic is in place.

Finally make sure you have that long foam piece that spans across the engine bay from the right to left side that fits over the raised area at the back of the engine bay... it goes from the battery box all the way to the other side of the bay... it helps form a seal that routes water away from the engine bay.

99$ https://www.asolutionsauto.com/produ...x-284b7aq01b-1
here is the full IPDM with case

Originally Posted by cleric670

You sure it seeped under the windshield? It's very common for the sunroof drains to clog and drain water into the car, or the engine main harness seal at the firewall to leak if it's not

Originally Posted by Muzi Moh

So I was driving pretty agressively today and all of sudden the rpm kinda started vibrating , the engine lost all power and slowly shut down . I had to tow the car away . It's a g37 6mt . When I try to start it it cranks or but it won't start . The battery is good because everything powers on and it cranks . But it just won't start . I popped the hood and found out there's no coolant in the reservoir but to my knowledge the car never over heats. Can anyone help me with this ?

Originally Posted by Muzi Moh

Hey so the mechanic is telling me the ecu isn't sending a command to the spark plugs to spark . Everything else is fine just won't start it cranks. Any ideas on what it could be ?