Fuel pump relay module - part numbers

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David Klopper

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I’ve recently been facing issues with intermittent low fuel pressure which I believe could be due to the infamous fuel pump relay module.

Anyway, I ordered part number AA8Z9D370B from Amazon but at first I received part number GA8A9D370AA (which I’m planning to return) and then on the second time I received part number GA8Z9D370A from a different supplier.

Rather than returning this one as well, does anyone know if any of these two parts are interchangeable in terms of build quality?

The only info I’ve been able to find online is Part Number: GA8Z9D370A
Supersession(s): AA8Z9D370B; GA8Z-9D370-A

I just want to make sure I’m not receiving an inferior part.

Thanks for any help.
 

Bronco2fan

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My only comment is why would you order a cheap Chinese knockoff from Amazon? I stay far away from them for any electrical components. Ford dealer. No guessing needed. These vehicles are known to be temperamental with electronics.
 

David Klopper

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My only comment is why would you order a cheap Chinese knockoff from Amazon? I stay far away from them for any electrical components. Ford dealer. No guessing needed. These vehicles are known to be temperamental with electronics.
It’s supposed to be an original Ford part from Gene Messer Ford of Amarillo. Amazon is just more convenient.
 

Ta2dResqr

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Personally, I went with the Dorman OE Fix part 601225. It has beefed up hardware internally to handle more current. It was ~$40 on RockAuto.
 

Tbird6

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Thanks much for that upgraded Dorman part number!
I have a low opinion of most Dorman stuff but this is a nice upgrade.

Do you recommend to swap this out as a maintenance item?
My 2013 MKS ECO is at 85K miles.
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Ta2dResqr

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Thanks much for that upgraded Dorman part number!
I have a low opinion of most Dorman stuff but this is a nice upgrade.

Do you recommend to swap this out as a maintenance item?
My 2013 MKS ECO is at 85K miles.
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For the price, I swapped mine during some fuel issues I was having. It felt warm/hot to the touch when the issue would occur. It ended up not fixing my specific issue but it was $40 and easy enough to do on a common failure point that was 7 yrs/100k miles old.
 

Tbird6

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Thank you very much! I hate throwing parts at things but since this can cause a total shut down it's a bit more important than most! Especially if it was bad enough that the after market came out with an improved part.
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Zpak

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Thank you very much! I hate throwing parts at things but since this can cause a total shut down it's a bit more important than most! Especially if it was bad enough that the after market came out with an improved part.
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That’s 100% something I’d change with high miles, or at lest have a spare in the trunk. Super easy to change and if it quits you’re definitely dead in the water.
 

Tbird6

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Well this sucks!!
Apparently the SHO does have folding rear seats BUT the MKS does not??
That's about the dumbest thing I have ever heard!
They are exactly the same car? How could Ford NOT put this on a Lincoln but it's standard on a Ford? I thought Lincoln was suppose to be Ford's premium brand?

I have been back and forth in the owners manual and sure enough not one mention of folding seats.

So now I need to remove both the bottom rear seat cushion and the rear seat back before I can get access to this module?

Well good news! You can get to it from the trunk by peeling back the trunk cover on the passenger side. 2-10mm nuts and it was a quick swap out. I used the improved Dorman part so thank again for bringing this to my attention!
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