N51 Spark Plug Question

maxor · 03-21-2019, 04:37 AM

So my 328 is experiencing misfires, managed to pull all 6 of the spark plugs and found that they where all black with slight buildup (that point to the engine running rich?).

View post on imgur.com

Would you say these plugs need to be replaced and could be the cause of the misfires or would this be considered normal?

m_thompson · 03-21-2019, 08:07 AM

Covered under the extended SULEV warranty?

maxor · 03-21-2019, 08:30 AM

Quote:

Originally Posted by m_thompson

Covered under the extended SULEV warranty?

At 155k, not covered.

Will have to pay for everything out of pocket. However spark plugs are relatively inexpensive.

Just don't want to replace them if it's not required. Money can be best spent elsewhere

m_thompson · 03-25-2019, 12:12 PM

Quote:

Originally Posted by maxor

At 155k, not covered.

You should have had the dealer replace them for free 5k miles ago.

Phyrexia · 03-26-2019, 12:50 PM

You should have replaced them long ago. Replace them now.

03-21-2019, 04:37 AM	#1
maxor Private 26 Rep 87 Posts Drives: E90 BMW 328i Join Date: Jan 2018 Location: Los Angeles, CA iTrader: (0)	N51 Spark Plug Question So my 328 is experiencing misfires, managed to pull all 6 of the spark plugs and found that they where all black with slight buildup (that point to the engine running rich?). View post on imgur.com Would you say these plugs need to be replaced and could be the cause of the misfires or would this be considered normal? Last edited by maxor; 03-21-2019 at 04:47 AM..
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03-21-2019, 08:07 AM	#2
m_thompson Major 137 Rep 1,423 Posts Drives: M-Sport 128i, 328xi, 3.0CS Join Date: Jun 2008 Location: New England, USA iTrader: (0) Garage List 2009 128i [0.00] 1972 3.0CS [10.00]	Covered under the extended SULEV warranty? __________________ '09 128i - Black Sapphire Metallic\Coral Red\Glacier Silver\N51 DISA\6MT\Navigation\Premium\M-Sport\Heated seats\Xenon\Headlights\iPod\Smartphone\Euro Delivery
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03-26-2019, 12:50 PM	#5
Phyrexia Resident Pedant 507 Rep 792 Posts Drives: '15 335i 8AT Join Date: Nov 2017 Location: Limbo iTrader: (1)	You should have replaced them long ago. Replace them now.
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