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Discussion Starter #1
Just last night when speed-up to pass one slow car and the Check engine came on with drivetrain message. Lost very much half of the power but I made home safely.
Hooked the ODB2 check the code and I got P0300, P0301.P0303. I cleared them and let it sit overnight. In this morning , started the car and everything back to normal just like never happened anything.
So what do you guy think it may cause? Sparkplugs or coils or injectors?
 

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Discussion Starter #3
Dealer changed it around 35Kmiles and now my car is 56K. You think I should change the spark plugs?
 

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I always start with what's easiest. Swapping coils would be, if you could get the car to throw the codes again, and hopefully lead you to a 1 cylinder misfire.

If you cant, then I would install new spark plugs. (Assuming you can do this yourself?)
 

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Discussion Starter #5
I always start with what's easiest. Swapping coils would be, if you could get the car to throw the codes again, and hopefully lead you to a 1 cylinder misfire.

If you cant, then I would install new spark plugs. (Assuming you can do this yourself?)
Well the check engine is gone this morning when I use the ODB2 clear the error code. What I am asking should I change spark plugs first or coils ? cuz with those codes telling me I have issue either spark plugs or coils ....My car still under CPO but I don't think CPO replace spark plugs
 

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If you cant get the codes to come back then how do you know it wasnt just bad gas that caused some misfiring?

You dont really change coils - you replace the bad one - if you have one. Will CPO cover coils?

If you were to shotgun the repair, I would change spark plugs first.
 

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Discussion Starter #7
If you cant get the codes to come back then how do you know it wasnt just bad gas that caused some misfiring?

You dont really change coils - you replace the bad one - if you have one. Will CPO cover coils?

If you were to shotgun the repair, I would change spark plugs first.
You right. I will start changing spark plug first cuz spark plug easy to do and about time to change them anyway. What p/n and brand should I get?
 

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realoem.com will give you the part #.

Assuming its the same as my 535i - Then Bosch ZR5TPP33S (interchangeable with ZR5TPP33). I but them in packs of 6 on eBay for $25. I think you would need 8 total?

Also get a gap tool if you dont have one. They come pre-gapped, but I always verify.
 

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realoem.com will give you the part #.

Assuming its the same as my 535i - Then Bosch ZR5TPP33S (interchangeable with ZR5TPP33). I but them in packs of 6 on eBay for $25. I think you would need 8 total?

Also get a gap tool if you dont have one. They come pre-gapped, but I always verify.
I look at site fcpeuro.com, they gave me this p/n ZR5TPP330A> bosch # 0242145541. Are they the same one as your p/n ?
 

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Whats the software level in your car?, had a 5 series at work w/ original factory software with 4/5/6 misfire and a programming fixed it. theres updated software to correct driveability to an extent. and cpo will cover it depending on your plan.
 

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Whats the software level in your car?, had a 5 series at work w/ original factory software with 4/5/6 misfire and a programming fixed it. theres updated software to correct driveability to an extent. and cpo will cover it depending on your plan.
I dont think the software caused the issue cuzI never have this problem before until now. How do I know what software version do I have on the car?
 

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Discussion Starter #14
Its different than mine (535i) but correct for your car. $7 a piece is a good price.
There are single and double platinum spark plugs , which one should I purchase? also there is a Japanese made spark plug model NGK Laser Iridium (SILZKBR8D85) cost little more but last longer up to 80-90Kmiles according to the AutoZone sale man. Has anyone here use this?
 

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Double Plat. For NGK - also a good company.

I really dont pay attention to the miles - I change plugs every 30k as the job takes 50 minutes @ a cost of $25.
 

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Double Plat. For NGK - also a good company.

I really dont pay attention to the miles - I change plugs every 30k as the job takes 50 minutes @ a cost of $25.
I've never done this before. If I want to do myself, which complete tools do I need to get? Most indy shop around my area, they don't do labor when I brought my own parts to them.
 

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I've never done this before. If I want to do myself, which complete tools do I need to get? Most indy shop around my area, they don't do labor when I brought my own parts to them.
The only "specialty tool" you will need is a thin walled spark plug socket. This assumes you have standard toolsets on hand, various sockets, torx heads, socket wrench with extenders, and a torque wrench.

If you dont, buying all those tools may be cost prohibitive if you dont normally DIY. I gradually collected everything as I did more and more DIY jobs.
 

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Discussion Starter #18
The only "specialty tool" you will need is a thin walled spark plug socket. This assumes you have standard toolsets on hand, various sockets, torx heads, socket wrench with extenders, and a torque wrench.



If you dont, buying all those tools may be cost prohibitive if you dont normally DIY. I gradually collected everything as I did more and more DIY jobs.


the Bosch vs NGK Iridium spark plugs any different on performance or just their lifetime? I am consider NGK a bit of pricey if the performance better or I can stick with the Bosch platinium????


Sent from my iPhone using Bimmerfest mobile app
 

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There are single and double platinum spark plugs , which one should I purchase? also there is a Japanese made spark plug model NGK Laser Iridium (SILZKBR8D85) cost little more but last longer up to 80-90Kmiles according to the AutoZone sale man. Has anyone here use this?
On my last car I installed the Iridium plugs. I didn't keep the car long enough to know about longevity, but the car ran well with them. Would I install them again? Most likely.
 
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