[raehrlich]

I want to know what part numbers and a recommended supplier to purchase spark plugs and ignition coils from. 2007 328XI E90 N52

Dealer diagnosed sputtering issue around 1800 rpm on a bad ignition coil. They recommended replacing just the one for $400.00 or replace all spark plugs and all coils for $1200.00. The plugs and coils are the originals with 165K miles on them. They also recommended going with the Delphi coils instead the Bosch which are currently installed. They noted Spark Plugs - High Power: 121031 and Ignition Coils: 121020

Well, I ain't paying no $1200.00 to replace no plugs and coils!

Anyway, searching the web there are lots of options, choices, replaced-by, supersedes and comments about bad knock-off products. I hoping someone has already done the research or knows exactly which part numbers and suppliers I should buy.

Thanks in advance...

[Phyrexia]

Holy Shit, $400 for one coil!

I had one coil go out at 65k and decided to replace them all since I'd just bought the car. I put the Bosch units, Bosch PN 0221504470, but others have reported good results with the Delphis and you shouldn't be afraid of them if they're easier to source.

My preferred retailer for Foreign Car Parts is in Groton, CT but I might get punished by the forum overlords if I directly link as they are a competitor of the primary forum sponsor.

[bluewater328]

Well, I have a new set of the Bosch plugs for sale (part#fr7npp332):
https://www.e90post.com/forums/showthread.php?t=1532725 {shameless I know}
These are literally out of the Bently Manual as the recommended.
https://www.bavauto.com/bmw-spark-pl...RoCgiYQAvD_BwE

The part they are recommending to you was the old part# I think.

Agree with above for the coils: 0221504470 (that's what I bought when I replaced my coils).

[atmosphericM]

LOL $1200.

Those guys are what give BMW dealers a bad name.

The job should be easy to do yourself.

[hassmaschine]

Replace the bad coil yourself for like $30. No reason to replace the rest if they are fine.

[bluewater328]

Originally Posted by hassmaschine

Replace the bad coil yourself for like $30. No reason to replace the rest if they are fine.

There are a lot of DIYs here as well as YouTube that tell you exactly what to do as long as you know what a ratchet is. The cost is some scraped knuckles, sweat and whatever plug/coil (set) you decide to buy, +1 beer after you're done.

[hassmaschine]

If you have a pre LCI, you can literally replace a coil with no tools at all.

[bluewater328]

Originally Posted by hassmaschine

If you have a pre LCI, you can literally replace a coil with no tools at all.

Ok, so I don't even want to talk about that... There is still the plastic cover Allen's though right?

[raehrlich]

I could replace just the one coil since the dealer identified cylinder #1 as the culprit. However, with 165K miles on these plugs and coils, I might as well replace them all now. It will only be a matter of time before then next one goes. I'm certain I can do the job as there are several really good videos out there showing how and I've changed plugs in other engines before. Most importantly, they indicate 18 Lb-Ft of torque. My only concern is breaking a plug in the cylinder when trying to remove them. With as many miles as they have on them, they might be pretty tight to bust loose.

My main objective for opening this thread is to ensure I buy the right parts and at the right price. Nothing ruins the ROI on a DIY more than buying the wrong stuff that can't be refunded.

A big thanks to everyone who has replied so far.

[hassmaschine]

Originally Posted by bluewater328

Ok, so I don't even want to talk about that... There is still the plastic cover Allen's though right?

No. The bolts are fake, lol. It just pops off.

[hassmaschine]

Originally Posted by raehrlich

I could replace just the one coil since the dealer identified cylinder #1 as the culprit. However, with 165K miles on these plugs and coils, I might as well replace them all now. It will only be a matter of time before then next one goes. I'm certain I can do the job as there are several really good videos out there showing how and I've changed plugs in other engines before. Most importantly, they indicate 18 Lb-Ft of torque. My only concern is breaking a plug in the cylinder when trying to remove them. With as many miles as they have on them, they might be pretty tight to bust loose.

My main objective for opening this thread is to ensure I buy the right parts and at the right price. Nothing ruins the ROI on a DIY more than buying the wrong stuff that can't be refunded.

A big thanks to everyone who has replied so far.

"a matter of time" - sure, but how much time? 5 years? 10? 15? I bet in 3-5 years you dont even own this car anymore. And its not like a coil failing is catastrophic..

I cant tell you what to do with your money, but there are at least 100 things I'd rather spend mine on than 5 coils that I don't really need..

[Spitfire007]

OEMBIMMERPARTS.COM

Order plugs and the most recent coils (Delphi brand, I think). Do it in an hour, hour and a half if you're drinking a beer st the same time.

I changed all at once because it was easy and cheap piece of mind. I didn't feel like chasing down a busted coil 20000 miles later.

[AWSB328iM]

$60 for spark plugs and $160 for Delphi coils. Just DIY!

[frisbeeguy]

Originally Posted by raehrlich

I could replace just the one coil since the dealer identified cylinder #1 as the culprit. However, with 165K miles on these plugs and coils, I might as well replace them all now. It will only be a matter of time before then next one goes. I'm certain I can do the job as there are several really good videos out there showing how and I've changed plugs in other engines before. Most importantly, they indicate 18 Lb-Ft of torque. My only concern is breaking a plug in the cylinder when trying to remove them. With as many miles as they have on them, they might be pretty tight to bust loose.

My main objective for opening this thread is to ensure I buy the right parts and at the right price. Nothing ruins the ROI on a DIY more than buying the wrong stuff that can't be refunded.

A big thanks to everyone who has replied so far.

A coilpack is simply...a coilpack....it's job: To build up energy and release the voltage to the sparkplugs. Are coilpacks a wear/tear item? ONLY if you NEVER change your sparkplugs until it's too late, otherwise they usually last the life of the vehicle. Do I have to replace all of them? No, only the defective one. If you want clean looking ones, then you can replace them all. Do NOT combine Bosch with Delphi, etc...Bosch with Bosch only. ONLY EXCEPTION is some older 07 models had a old design coil pack that didn't ensure proper contact with the sparkplug (a BMW/Bosch design flaw)....there is a new revision out there by Bosch (the OEM coilpack manufacturer). If the vehicle has the old revision, then I suggest to replace them all....to see if you have the old ones, look here: https://www.e90post.com/forums/showthread.php?t=914418 Post #1, left new, right old.

[W37V]

Unrelated to OPs question, but why the heck did the price of BMW plugs go up from $12 each to $17 each?

Also, Bosh plugs are $5 each while NGK are $7 each. Which are better?

[bluewater328]

Originally Posted by W37V

Unrelated to OPs question, but why the heck did the price of BMW plugs go up from $12 each to $17 each?

Also, Bosh plugs are $5 each while NGK are $7 each. Which are better?

I like NGK and that is what the dealer threw in the last time I actually had service with them (back under warranty) when I had some stumbling. But the Bosch's are still an OE, so in the long run, it should be negligible -- but make sure you're buying the latest iteration of the Bosch plugs as they've changed over the years (not that the old stuff should still be on the shelf).

[frisbeeguy]

Originally Posted by W37V

Unrelated to OPs question, but why the heck did the price of BMW plugs go up from $12 each to $17 each?

Also, Bosh plugs are $5 each while NGK are $7 each. Which are better?

Doesn't matter as long as it's OEM approved (use realoem for part #
s). What matters is getting it from fcpeuro since they have lifetime warranty. So you only pay once for plugs/coils, and you can swap them out anytime you'd like for the cost of shipping only. If you want you can get genuine BMW, but you're only paying for the "BMW" name.

[hassmaschine]

BMW doesn't manufacture their own spark plugs. Just buy the NGK or Bosch.

[W37V]

Originally Posted by bluewater328

I like NGK and that is what the dealer threw in the last time I actually had service with them (back under warranty) when I had some stumbling. But the Bosch's are still an OE, so in the long run, it should be negligible -- but make sure you're buying the latest iteration of the Bosch plugs as they've changed over the years (not that the old stuff should still be on the shelf).

Yaps

Originally Posted by frisbeeguy

Doesn't matter as long as it's OEM approved (use realoem for part #
s). What matters is getting it from fcpeuro since they have lifetime warranty. So you only pay once for plugs/coils, and you can swap them out anytime you'd like for the cost of shipping only. If you want you can get genuine BMW, but you're only paying for the "BMW" name.

I used FCP already and their awesome warranty. About to use it again. I was just surprised by the $$ hike.

Originally Posted by hassmaschine

BMW doesn't manufacture their own spark plugs. Just buy the NGK or Bosch.

I understand it's just BMW branding and they are either Bosh or NGK. What was interesting is the price hike. But then again, it seems like BMW hiked the price on many of their parts. Left engine mount for 335IS now sells for over $650 for one. Good bye cheap mount upgrade.

[nsjames]

Originally Posted by W37V

Y
I understand it's just BMW branding and they are either Bosh or NGK. What was interesting is the price hike. But then again, it seems like BMW hiked the price on many of their parts. Left engine mount for 335IS now sells for over $650 for one. Good bye cheap mount upgrade.

the manufacturer makes enough spare parts that they anticipate the need for.

as stock declines, the price goes up.

so everyone bought stock IS mounts, so now the price has gone up because of the depleted inventory.

it's not just BMW.

[atmosphericM]

Ignition coils not wear and tear? lol ok...

[Blueeyesredpanda]

replace all spark plugs and all coils for $1200.00...

With that money you can get Okada Plasma direct with NGK spark plugs