What did you do to / for your E53 today?? - Page 976

mr_robot · #**9751** 10-30-2018, 09:28 AM

This morning my fuel pump relay finally failed.

Had happened couple times where in cold mornings it would just keep cranking and not start. Had to crank 2-3 times and would fire up again.

Googled the symptoms and lead to the fp relay going bad so ordered one on Amazon and just had it laying around as it wasn't doing anymore (got bit warmer)

So luckily had it on hand and had to do it this morning. Drop the glove box and drop the fuse box to access the green relay and done.

Seems to fire up instantly now where before it would take slightly longer (talking milliseconds here lol) and car also felt more responsive and cured the rough idling but could be all in my head and more seat time is needed to see.

Here is the relay I purchased:
OES Genuine Fuel Pump Relay for select BMW models https://www.amazon.com/dp/B001G7INQ4..._GUf2Bb2X52NAJ

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270_BMW · #**9752** 10-30-2018, 05:20 PM

Per Andrew’s awesome Fuel Siphon Jet DIY I was able to replace the o ring and add Teflon tape and a zip tie. Goodbye running out of gas at a quarter tank! Side by side if the new and old along with the initial picture of the assembly removal where you can see the o ring saying Hello!

CleanIsFast · #**9753** 10-30-2018, 05:26 PM

Quote:

Originally Posted by mr_robot

This morning my fuel pump relay finally failed.

Had happened couple times where in cold mornings it would just keep cranking and not start. Had to crank 2-3 times and would fire up again.

Googled the symptoms and lead to the fp relay going bad so ordered one on Amazon and just had it laying around as it wasn't doing anymore (got bit warmer)

So luckily had it on hand and had to do it this morning. Drop the glove box and drop the fuse box to access the green relay and done.

Seems to fire up instantly now where before it would take slightly longer (talking milliseconds here lol) and car also felt more responsive and cured the rough idling but could be all in my head and more seat time is needed to see.

Here is the relay I purchased:
OES Genuine Fuel Pump Relay for select BMW models https://www.amazon.com/dp/B001G7INQ4..._GUf2Bb2X52NAJ

Sent from my iPhone using Tapatalk Pro

Is this a normal occurrence on our 4.8is? I know this would be common the E39 M5s, I knew guys who would carry a spare relay in the car just for that specific issue. You have me wondering if I should do the same now.

andrewwynn · #**9754** 10-30-2018, 06:43 PM

I'm betting there is a non essential relay that could be swapped. (Anybody know)
Example: rear wiper, rear window defrost, seat heater. All those use a relay maybe one is the same.

Those relays are usually treasured rated by how many million operations that can perform. Very reliable

Overboost · #**9755** 10-30-2018, 06:46 PM

Quote:

Originally Posted by andrewwynn

I'm betting there is a non essential relay that could be swapped. (Anybody know)
Example: rear wiper, rear window defrost, seat heater. All those use a relay maybe one is the same.

Those relays are usually treasured rated by how many million operations that can perform. Very reliable

Horn relay should be the same. It is on the E46

andrewwynn · #**9756** 10-30-2018, 07:05 PM

Bingo perfect. I wouldn't bother having an extra spare when the car has some built in spares.

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Overboost · #**9757** 10-30-2018, 07:08 PM

At $15, just replace it with a new relay and drive worry free for the next 10 years.

mr_robot · #**9758** 10-30-2018, 09:24 PM

Yes it was cheap enough to just order it and not think about it again. Just sucked that it finally crapped out on a work morning but I guess better than middle of nowhere as I had all the tools.

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