n54 vs n55 coilpacks?

specialist · 04-08-2015, 12:02 AM

Is there a difference? need new ones going to buy some soon?

Aashenfox · 04-08-2015, 03:15 AM

BMW recommends all dealers to swap out the OE Bosch coils on N54s for the Delphi ones used on the N55 at change intervals, according to member BavAuto here, who is usually an authority on such matters.

Socket · 04-08-2015, 05:27 AM

Just a guess but is the N54 for the N54 engine and the N55 is for the N55 engine?
is there such a thing LOL

Aashenfox · 04-08-2015, 05:56 AM

Not sure what you mean. BMW realised that the Bosch units weren't that reliable, and employed Delphi ones on the N55. Since then, BMW dealers are instructed to install the Delphi coils on N54s also...apart from the metal housing, their function is identical. Theory goes that they are less prone to failure due to temperature, as the metal housing acts a little like a heatsink and helps the coil hold its shape in the hot N54. I'm not authority on this, but I believe the info I have read comes from those in the know.

specialist · 04-10-2015, 11:28 PM

ok so i bought new n55 coil packs and they have same part number as the n54

no difference that i found

my car works and no miss fires

meyergsr · 04-11-2015, 04:23 PM

Quote:

Originally Posted by specialist

ok so i bought new n55 coil packs and they have same part number as the n54

no difference that i found

my car works and no miss fires

Did you receive Delphi packs or Bosch? Did the new ones look identical to your old?

LightningTuned · 04-11-2015, 08:18 PM

No shit? Wish I would of known this I just replaced all 6 Coils with bosch.

cvc 22349a · 04-12-2015, 11:18 AM

Quote:

Originally Posted by specialist

ok so i bought new n55 coil packs and they have same part number as the n54

no difference that i found

my car works and no miss fires

Where did you buy them from?

nitehawk · 04-12-2015, 02:06 PM

Quote:

Originally Posted by Aashenfox

Not sure what you mean. BMW realised that the Bosch units weren't that reliable, and employed Delphi ones on the N55. Since then, BMW dealers are instructed to install the Delphi coils on N54s also...apart from the metal housing, their function is identical. Theory goes that they are less prone to failure due to temperature, as the metal housing acts a little like a heatsink and helps the coil hold its shape in the hot N54. I'm not authority on this, but I believe the info I have read comes from those in the know.

Is there a service bulletin to back this up? RealOEM still applies Bosch parts to n54 cars.

Aashenfox · 04-13-2015, 08:48 AM

Quote:

Originally Posted by nitehawk

Is there a service bulletin to back this up? RealOEM still applies Bosch parts to n54 cars.

realoem.com refers to parts that were fitted to cars new, not revised parts. Unless that part then becomes discontinued. I don't know if there's a service bulletin or not. This was written recently on the forum by BavAuto, I've never seen that member provide bad information. Like I say, I'm just regurgitating something I heard, nothing more. I can't help you any further than that. Suffice it to say there are also plenty of other reviews on the forum of Delphi coils used on N54s with total success. When I change my coils I will use the Delphi units.

buylongterm · 04-13-2015, 09:02 AM

Not to long ago, I had to replace a coil and at first the dealership gave me the Delphi one (with the metal housing), but was told that since I was only replacing one, I should use to older (Bosch) model to match the ones in my car.

nitehawk · 04-13-2015, 10:56 AM

Quote:

Originally Posted by Aashenfox

realoem.com refers to parts that were fitted to cars new, not revised parts. Unless that part then becomes discontinued. I don't know if there's a service bulletin or not. This was written recently on the forum by BavAuto, I've never seen that member provide bad information. Like I say, I'm just regurgitating something I heard, nothing more. I can't help you any further than that. Suffice it to say there are also plenty of other reviews on the forum of Delphi coils used on N54s with total success. When I change my coils I will use the Delphi units.

Thanks, I'll look it up.
I agree with the above post though if you're switching to Delphi, its better to replace all 6 to stay consistent.

2010 M Sport · 04-13-2015, 11:17 AM

What is the Delphi part#? Price compared to Bosch?

The Convert · 04-13-2015, 11:24 AM

Quote:

Originally Posted by LightningTuned

No shit? Wish I would of known this I just replaced all 6 Coils with bosch.

So did I and at least appears to be dead as my car is running rough AF. Smh

specialist · 04-13-2015, 09:37 PM

When I ordered them from a vin number 2014 n55 335is when i got them i got bosch coils when i pulled them out they look identical and same part number on my 2007 335i n54

CantCatchMe · 05-21-2015, 09:01 PM

I'm at 45k miles on my N55, bought a set of Delphi ones for $200 shipped on eBay. I'm going to install them this upcoming week. Personally I didn't want the Delphi cause of the metal but hey if BMW sells them I can't be in crap cause they recommend it now.

torn08 · 07-16-2015, 02:18 PM

What's the Delphi part# and best place to buy please?

CarAbuser · 07-16-2015, 03:17 PM

Quote:

Originally Posted by torn08

What's the Delphi part# and best place to buy please?

According to real OEM; Part No. 12138616153

http://www.realoem.com/bmw/enUS/part...&q=12138616153

I'm going to order a set this weekend.

einbruch10 · 07-16-2015, 04:26 PM

You can use the new delphi ones for the s55 as well. No difference just part number i guess.

http://www.amazon.com/gp/aw/c/ref=mw_dp_buy_crt

04-08-2015, 12:02 AM	#1
specialist First Lieutenant 26 Rep 352 Posts Drives: 335i Join Date: Apr 2013 Location: toronto iTrader: (0)	n54 vs n55 coilpacks? Is there a difference? need new ones going to buy some soon?
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04-08-2015, 03:15 AM	#2
Aashenfox Captain 128 Rep 664 Posts Drives: 08 E92 335xi 6AT Join Date: Jan 2015 Location: Brit in Greece iTrader: (0)	BMW recommends all dealers to swap out the OE Bosch coils on N54s for the Delphi ones used on the N55 at change intervals, according to member BavAuto here, who is usually an authority on such matters. __________________ 08 E92 335xi 6AT, Sapphire Black Metallic Modlist: 19x8.5+32/19x9.5+35 BBS CH-R Black, Michelin PSS 225/35/19 - 255/30/19, rolled rear fenders \| KW v3 coilovers \| Akrapovic exhaust Keep it on the black stuff shiny side up!
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04-08-2015, 05:27 AM	#3
Socket Lieutenant General 4542 Rep 11,903 Posts Drives: 335i Join Date: Nov 2014 Location: Australia iTrader: (4) Garage List 2008 BMW E92 [0.00]	Just a guess but is the N54 for the N54 engine and the N55 is for the N55 engine? is there such a thing LOL Attached Images
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04-08-2015, 05:56 AM	#4
Aashenfox Captain 128 Rep 664 Posts Drives: 08 E92 335xi 6AT Join Date: Jan 2015 Location: Brit in Greece iTrader: (0)	Not sure what you mean. BMW realised that the Bosch units weren't that reliable, and employed Delphi ones on the N55. Since then, BMW dealers are instructed to install the Delphi coils on N54s also...apart from the metal housing, their function is identical. Theory goes that they are less prone to failure due to temperature, as the metal housing acts a little like a heatsink and helps the coil hold its shape in the hot N54. I'm not authority on this, but I believe the info I have read comes from those in the know. __________________ 08 E92 335xi 6AT, Sapphire Black Metallic Modlist: 19x8.5+32/19x9.5+35 BBS CH-R Black, Michelin PSS 225/35/19 - 255/30/19, rolled rear fenders \| KW v3 coilovers \| Akrapovic exhaust Keep it on the black stuff shiny side up!
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04-10-2015, 11:28 PM	#5
specialist First Lieutenant 26 Rep 352 Posts Drives: 335i Join Date: Apr 2013 Location: toronto iTrader: (0)	ok so i bought new n55 coil packs and they have same part number as the n54 no difference that i found my car works and no miss fires
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04-11-2015, 08:18 PM	#7
LightningTuned Private 13 Rep 68 Posts Drives: 07 335i E90 Join Date: Jan 2015 Location: Va Beach iTrader: (0)	No shit? Wish I would of known this I just replaced all 6 Coils with bosch.
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04-13-2015, 09:02 AM	#11
buylongterm Private First Class 15 Rep 115 Posts Drives: 2010 BMW 335XI M package Join Date: Apr 2013 Location: Chicago, IL iTrader: (0)	Not to long ago, I had to replace a coil and at first the dealership gave me the Delphi one (with the metal housing), but was told that since I was only replacing one, I should use to older (Bosch) model to match the ones in my car. __________________ 2010 335xi Coupe \| M Package COBB Stage 1+ Aggressive FMIC \| aFe DCI \| Helix FMIC \| VRSF CP 2011 535diI Last edited by buylongterm; 04-13-2015 at 09:15 AM..
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04-13-2015, 11:17 AM	#13
2010 M Sport Banned 29 Rep 240 Posts Drives: 2010 M Sport Join Date: Nov 2013 Location: Florida iTrader: (5)	What is the Delphi part#? Price compared to Bosch?
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04-13-2015, 09:37 PM	#15
specialist First Lieutenant 26 Rep 352 Posts Drives: 335i Join Date: Apr 2013 Location: toronto iTrader: (0)	When I ordered them from a vin number 2014 n55 335is when i got them i got bosch coils when i pulled them out they look identical and same part number on my 2007 335i n54
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05-21-2015, 09:01 PM	#16
CantCatchMe Lieutenant Colonel 340 Rep 1,744 Posts Drives: 2012 335i xdrive msport(E92) Join Date: Aug 2014 Location: West Bloomfield, MI iTrader: (2)	I'm at 45k miles on my N55, bought a set of Delphi ones for $200 shipped on eBay. I'm going to install them this upcoming week. Personally I didn't want the Delphi cause of the metal but hey if BMW sells them I can't be in crap cause they recommend it now.
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07-16-2015, 02:18 PM	#17
torn08 Second Lieutenant 45 Rep 235 Posts Drives: e93 335i Join Date: May 2015 Location: Cherry Hill, NJ iTrader: (0)	What's the Delphi part# and best place to buy please?
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07-16-2015, 04:26 PM	#19
einbruch10 these are the times that try mens soul's 37 Rep 280 Posts Drives: 2008 335i Join Date: Dec 2013 Location: columbus georgia iTrader: (2)	You can use the new delphi ones for the s55 as well. No difference just part number i guess. http://www.amazon.com/gp/aw/c/ref=mw_dp_buy_crt
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