Engine Harness Boot Missing - Water Damage

[DCNatFan]

Ran into some problems with the 2010 G37x and took awhile for the dealer to find the problem. Ultimately, this is what I am being told.

The main engine harness plug boot was missing, which is what lead to water damage, The main engine harness connector is behind the battery under a plastic molding, which when it rains can have water come through. The boot that normally covers where both parts of the engine harness connect, from what I've been told does come with new harness. I personally haven't seen this myself, but talking to an advisor who has been working for the company for many years has seen this kind of thing happen, its not very often that it does, but there is always a chance it can. The issue that is with your vehicle is that the engine harness boot isn't there and it allowed water to hit where they connect which lead to the wires corroding there.
Here is the dealer estimate:
Parts are as listed.
BCM (284B1-1nc5b)-$512.93
Harness has 2 parts
24011-1bn0b -$1167.27
24012-1nf0a -$2184.20
Labor - $2,599.00 (20 hours)
Tax - $231.86
Total - $6,695.26 (They offered to do it for $5,826.26)

Does this estimate seem reasonable?
Anyone ever heard of this problem?
The car has 85,000 miles on it and wondering if it is worth dumping this much money into the car.

[telcoman]

When my previous 06 G35 6 speed with 171796 miles needed about $3k worth of work, I traded it in for my current 2012 G37S

Telcoman

[13_SkylineSedan]

So they suggest replacing your entire wiring harness plus the BCM because the "plug boot" is missing? (By the way, the BCM is inside the cabin - the area behind the battery is where the IPDM is). That seems a wee bit suspect to me. What were the problems you had which led to this diagnosis?

[DCNatFan]

The car would not start. Got a jump start and worked for a few days but then dead again. Replaced battery. After that car went dead and had to have towed to dealer. Took them a few days before coming up with this diagnosis.

[13_SkylineSedan]

Man that's a rough diagnosis. The car, if stock and in good condition, is valued around 12-13k so they're asking you to spend almost 1/2 the car's value to fix it. And then will it be fixed? Yikes.

I have heard of people having water problems with the IPDM which is mounted on the firewall behind the battery. That should have a big plastic cover on it. In my opinion (which really doesn't mean anything - I'm not qualified) the suggestion that the BCM needs replacing seems odd to me. Maybe they meant the IPDM, which is around the same cost?

Wish you could get it to an independent garage for a solid 2nd opinion.