N57 glow plug harness on M57?

Tambohamilton · 12-17-2019, 09:07 AM

Anyone know if the N57 glow plug harness will fit an M57? Seems the M57 wires are only available as part of the complete loom...

PerfectAce · 12-17-2019, 09:53 AM

Double check me on this, but I don't believe they are interchangeable. The wiring diagrams on newtis.info show that on the N57 there is an interim connector (X2335) between the glow plug module and the DDE which is not present on the M57 wiring. This explains why you are able to find the N57 harness as a separate part -- it can be separated from the complete engine loom, it appears that the M57 harness cannot.

What do you need an N57 glow plus harness for anyway? Break the tabs on the big 12-pin connector?

335dlci · 12-17-2019, 01:46 PM

No

Tambohamilton · 12-17-2019, 03:20 PM

Thanks guys, I didn't think it would work, but wanted to check anyhow. Realoem certainly only lists the separate part for N57 engines only too.

I've never had all 6 plugs working in my car. When I bought it, only 1 (cyl 5) worked (or at least showed no code). I figured that meant the controller was OK, so I went and replaced all 6 plugs. Cyl 1 didn't work right from the off. It was summer though, so I didn't bother touching it again. Some 15k miles later, cyl 1, 2, and 5 are throwing codes. So I'm now wondering if maybe the harness/connectors are bad, or the controller, or just 1x bad luck and a handful of poor plugs? They were genuine Bosch items, though I bought them new old stock on eBay.

I think the answer is just get 6 new plugs from a reputable supplier.

What brand do people recommend? Beru, Bosch, NGK, other?

Cheers

PerfectAce · 12-17-2019, 03:29 PM

So you've never replaced the controller? I would start there -- it's the most failure prone component.

Tambohamilton · 12-17-2019, 03:57 PM

Can it be the cause even if some of the plugs are still working (or at least not throwing codes)?

9mmkungfu · 12-17-2019, 08:19 PM

Yes. I had a glow plug fault (one glow plug fault for one glow plug) - it was the controller.

Original glow plugs, 190k miles.

Tambohamilton · 12-18-2019, 01:34 AM

OK, thanks!

Tambohamilton · 12-18-2019, 04:21 AM

Beru controllers generally OK? I assume they're OE?

Tambohamilton · 04-01-2020, 05:03 PM

Just for closure - I replaced the controller with a Beru item the other day, and all codes went away. I didn't change any more plugs, or any wiring.

alex sol · 04-18-2020, 11:13 PM

looking to do the same. did you remove the intake manifold?

Tambohamilton · 04-19-2020, 01:08 AM

Yes. Apparently it can be done without, but I found it hard enough with the manifold off - there's still a mess of cables above and around the controller!

kpm · 04-21-2020, 08:34 PM

Agree 1st time around, remove the intake manifold!
I just replaced my controller. Tried it first with the intake manifold on but gave up. Smaller hands would have helped as would prior familiarity with that 12 pin rectangular connector and it's tab design and release. Plus, our 2009 d’s have that additional coolant pump and hoses that further confines the working space and view. Taking off the intake made it a little easier but still didn’t happen without more curse words. Just took some patience.

Tambohamilton · 04-22-2020, 03:22 AM

Yeah, my 2007 has that pump too. I found it really painful wedging my hand in between all the hoses and wires to get to the thing!

Nozz · 10-01-2022, 09:57 PM

Hey, bit late in this thread, I have just replaced the glow plugs and the module, and i still get cyl 2-3 errors, its definitely the wires, connector is a bit burned and the old module connector was burned as well. Is it possible to replace the harness? M57 engine, it's a fire hazard, seriously thinking about to just simply disconnect it and remap it and send it till it breaks.

12-17-2019, 09:07 AM	#1
Tambohamilton Brigadier General 3058 Rep 3,909 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	N57 glow plug harness on M57? Anyone know if the N57 glow plug harness will fit an M57? Seems the M57 wires are only available as part of the complete loom...
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12-17-2019, 09:53 AM	#2
PerfectAce Second Lieutenant 107 Rep 202 Posts Drives: 2011 335d Sport Join Date: Jun 2017 Location: Austin, Texas iTrader: (0)	Double check me on this, but I don't believe they are interchangeable. The wiring diagrams on newtis.info show that on the N57 there is an interim connector (X2335) between the glow plug module and the DDE which is not present on the M57 wiring. This explains why you are able to find the N57 harness as a separate part -- it can be separated from the complete engine loom, it appears that the M57 harness cannot. What do you need an N57 glow plus harness for anyway? Break the tabs on the big 12-pin connector? __________________ BRR Tuned
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12-17-2019, 01:46 PM	#3
335dlci Lieutenant Colonel 277 Rep 1,574 Posts Drives: 335d Join Date: Apr 2014 Location: Socal iTrader: (0)	No
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12-17-2019, 03:20 PM	#4
Tambohamilton Brigadier General 3058 Rep 3,909 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	Thanks guys, I didn't think it would work, but wanted to check anyhow. Realoem certainly only lists the separate part for N57 engines only too. I've never had all 6 plugs working in my car. When I bought it, only 1 (cyl 5) worked (or at least showed no code). I figured that meant the controller was OK, so I went and replaced all 6 plugs. Cyl 1 didn't work right from the off. It was summer though, so I didn't bother touching it again. Some 15k miles later, cyl 1, 2, and 5 are throwing codes. So I'm now wondering if maybe the harness/connectors are bad, or the controller, or just 1x bad luck and a handful of poor plugs? They were genuine Bosch items, though I bought them new old stock on eBay. I think the answer is just get 6 new plugs from a reputable supplier. What brand do people recommend? Beru, Bosch, NGK, other? Cheers
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12-17-2019, 03:29 PM	#5
PerfectAce Second Lieutenant 107 Rep 202 Posts Drives: 2011 335d Sport Join Date: Jun 2017 Location: Austin, Texas iTrader: (0)	So you've never replaced the controller? I would start there -- it's the most failure prone component. __________________ BRR Tuned
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12-17-2019, 03:57 PM	#6
Tambohamilton Brigadier General 3058 Rep 3,909 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	Can it be the cause even if some of the plugs are still working (or at least not throwing codes)?
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12-17-2019, 08:19 PM	#7
9mmkungfu Captain 198 Rep 844 Posts Drives: 335d, 535d, 750i, X5 35d Join Date: Sep 2014 Location: United States iTrader: (1)	Yes. I had a glow plug fault (one glow plug fault for one glow plug) - it was the controller. Original glow plugs, 190k miles.
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12-18-2019, 01:34 AM	#8
Tambohamilton Brigadier General 3058 Rep 3,909 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	OK, thanks!
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12-18-2019, 04:21 AM	#9
Tambohamilton Brigadier General 3058 Rep 3,909 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	Beru controllers generally OK? I assume they're OE?
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04-01-2020, 05:03 PM	#10
Tambohamilton Brigadier General 3058 Rep 3,909 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	Just for closure - I replaced the controller with a Beru item the other day, and all codes went away. I didn't change any more plugs, or any wiring.
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04-18-2020, 11:13 PM	#11
alex sol Second Lieutenant 27 Rep 221 Posts Drives: 2009 335d Join Date: Feb 2017 Location: Toronto Canada iTrader: (0)	looking to do the same. did you remove the intake manifold?
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04-19-2020, 01:08 AM	#12
Tambohamilton Brigadier General 3058 Rep 3,909 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	Yes. Apparently it can be done without, but I found it hard enough with the manifold off - there's still a mess of cables above and around the controller!
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04-21-2020, 08:34 PM	#13
kpm Enlisted Member 6 Rep 41 Posts Drives: 2009 E90 335d Monaco Blue Join Date: Mar 2014 Location: GTA, Ontario iTrader: (0) Garage List 1985 325e BMW [0.00] 2009 328i [0.00] 1991 BMW 318is [0.00] 2009 BMW 335d [0.00]	Agree 1st time around, remove the intake manifold! I just replaced my controller. Tried it first with the intake manifold on but gave up. Smaller hands would have helped as would prior familiarity with that 12 pin rectangular connector and it's tab design and release. Plus, our 2009 d’s have that additional coolant pump and hoses that further confines the working space and view. Taking off the intake made it a little easier but still didn’t happen without more curse words. Just took some patience.
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04-22-2020, 03:22 AM	#14
Tambohamilton Brigadier General 3058 Rep 3,909 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	Yeah, my 2007 has that pump too. I found it really painful wedging my hand in between all the hoses and wires to get to the thing!
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10-01-2022, 09:57 PM	#15
Nozz Registered 0 Rep 2 Posts Drives: e90 330d Join Date: Oct 2022 Location: United Kingdom iTrader: (0)	Hey, bit late in this thread, I have just replaced the glow plugs and the module, and i still get cyl 2-3 errors, its definitely the wires, connector is a bit burned and the old module connector was burned as well. Is it possible to replace the harness? M57 engine, it's a fire hazard, seriously thinking about to just simply disconnect it and remap it and send it till it breaks.
	Appreciate 0 Quote