[CarterM5]

So I got up this morning, stopped at the gas station for a
Fill-up. I dropped my son off at school. Got back in the car
Started it up, drove for about a block and felt this sudden drop
In power and stalled out. I tried to restart several times the engine
Would turn over but would quickly die.
Had it towed home and pulled these peake codes…

63 “Control unit self-test, Safety Concept master check”<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com<img src=" /><o></o>
E8 - Evaporative emission purge valve functional check <o></o>
01 - Fuel pump relay <o></o>
I have had E8 for awhile/ came up after I replaced fuel filter.<o></o>
I am wondering if “01 Fuel pump relay” needs replacing or <o></o>
If I am due for a new fuel pump? I am assuming 63 is a <o></o>
Result of these and will go away once fixed..<o></o>
Any advice would be appreciated, thanks in advance… <o></o>
<o></o>
<o></o>
<o></o>
<o></o>

 

[havasusteve03Beast]

<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com<img src=" /><o></o>
<o></o>
<o> deleted</o>

 

[pjfox23]

Not sure if the codes are related. It definitely won't hurt to pop in a new relay - it's located in the trunk. After that, there is a procedure for testing the fuel pump directly - search around. Good luck.

 

[Ice9]

I had the exact same problem about a year ago -- the only time the M5 has failed me. it simply conked out while driving home. Had it towed to the dealer and sure enough it was a fuel pump failure. $800-$1,000 later everything worked fine....

 

[ChrisM]

There are a couple of good threads on replacing the fuel pump, its a very easy DIY.

Its also easy to see whether its the fuel pump or the fuel relay, PM me if you need help.

Bentley guide has lots of helpful info for both procedures!

 

[mchin]

I apologize if this has been said already but, check the fuse in the trunk which is located on the passenger side next to the relays. I believe that it is 20Amps.

I had this problem and it was a blown fuse. It has happened to me twice and both times the same fuse in the trunk was blown. The second time I got the relay code and the parts guy said that generally you don't get the code unless the car is dead and won't start at all.

Good luck.

Mike.

 

[CarterM5]

Thanks guys, I checked the fuses in the glove box and trunk and all look ok. I went ahead and ordered
a new relay (part # is 61357892976 for those that may need one/ kind of hard to find online) I am going
to try that first, if that doesent work I guess I am in for a new fuel pump. I hope not, car only has
62K miles...

 

[ChrisM]

You don't need to buy a relay to test whether its causing the problem or not.

Just lift off back seat, undo access plate to fuel tank, take our electrical plug and put your multimeter on two of the points (the brown and purple wires iirc).

Then get someone to start ignition, if you get ~12v at the pump then the relay is fine and the pump is busted. If not its probably the relay.