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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E90/E91/E92/E93 (2006 - 2013)

E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 01-06-2013, 08:40 AM
WendyS WendyS is offline
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Cost of Changing Spark Plugs

Hi. I have a 2009 335xi with 41,000 miles and I'm thinking about new spark plugs. It's still under the CPO warranty, but no maintenance warranty left. The dealer told me it will be about $400 to change the spark plugs... that seems quite high to me. But, I'm afraid if I do it or have somebody other than the dealer do it, future warranty work could be an issue. Does anyone have thoughts? Thanks.
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  #2  
Old 01-06-2013, 09:09 AM
ctuna ctuna is online now
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My Indy quoted 300 as a reference point

My Indy quoted 300 as a reference point.
If you look at the DIY you do have to remove quite a
bit of stuff to get to the back two plugs.
But that's California prices.

Last edited by ctuna; 01-06-2013 at 09:31 AM.
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  #3  
Old 01-06-2013, 09:34 AM
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fun2drive fun2drive is offline
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Do you have two hours and a couple of tools like a spark plug wrench needed for this car? They can be purchased by our vendors for 15-20 bucks. Plugs run around a 100 bucks or less and a torque wrench to torque the plugs in. Seems like a lot of tools but most of us have these which are considered common.
There is nothing hard about changing the plugs and there are many DIYs with pictures to guide you step by step through the process. Do the plug install with the engine cold or having sat for many hours.
That way you know the job was done right and no one can question that to include the dealer. Annotate that in your warranty book or where you keep your records to include the receipt for the plugs and be happy...
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  #4  
Old 01-06-2013, 10:16 AM
joeyl13 joeyl13 is offline
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Question... Is it advisable to change the plugs at 41K?
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  #5  
Old 01-06-2013, 10:20 AM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by WendyS View Post
Hi. I have a 2009 335xi with 41,000 miles and I'm thinking about new spark plugs. It's still under the CPO warranty, but no maintenance warranty left. The dealer told me it will be about $400 to change the spark plugs... that seems quite high to me. But, I'm afraid if I do it or have somebody other than the dealer do it, future warranty work could be an issue. Does anyone have thoughts? Thanks.

Wanna save some cash?

Click here.

Then, click here.

Here's good info on misfires and what's happening - not exclusive to Cobb - any capable OBDII cable reading BMW codes will work famously:




You might want to 'scope yer ride to verify/assure good result - lotsa info here.

Don't have an O-Scope? No worries....view this:

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  #6  
Old 01-06-2013, 10:20 AM
1zamboni 1zamboni is offline
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Not so sure but if it's benefit on MPG I would do it.
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  #7  
Old 01-06-2013, 10:23 AM
Tom K. Tom K. is offline
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Quote:
Originally Posted by joeyl13 View Post
Question... Is it advisable to change the plugs at 41K?
BMW calls for 45k for the 335i and 100k for the NA motors. OP has a 335i, you have a non-turbo engine.

Tom
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  #8  
Old 01-06-2013, 10:25 AM
ctuna ctuna is online now
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On a non Turbo not necessary to 90k

On a non Turbo not necessary to 90k
The Turbo's are suppose to get done every 45 k.
Mike Millers likes them changed at 60k (non turbo)with one of the other reasons
to change them being to make sure they don't get seized up in place and to
check for oil leakage on the valve cover.

Last edited by ctuna; 01-06-2013 at 01:18 PM.
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  #9  
Old 01-06-2013, 10:53 AM
unrealii unrealii is offline
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Quote:
Originally Posted by Tom K. View Post
BMW calls for 45k for the 335i and 100k for the NA motors. OP has a 335i, you have a non-turbo engine.

Tom
Correction, OP has a turbo engine
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  #10  
Old 01-06-2013, 11:34 AM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by WendyS View Post
Hi. I have a 2009 335xi with 41,000 miles and I'm thinking about new spark plugs. It's still under the CPO warranty, but no maintenance warranty left. The dealer told me it will be about $400 to change the spark plugs... that seems quite high to me. But, I'm afraid if I do it or have somebody other than the dealer do it, future warranty work could be an issue. Does anyone have thoughts? Thanks.

Another thought: Pretty good video on easy oscilloscope analysis, a thing that'll resonate w/many previous posts. Stick with 'em if your view....might be li'l slow but yields good things.

Note: Picoscope, like nearly all PC based oscilloscopes, mainly a fast ADC; USB 2.0. Have a couple - very versatile software. Good juju. May buy their auto kit.



Last edited by CALWATERBOY; 01-07-2013 at 08:26 AM.
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  #11  
Old 01-06-2013, 12:36 PM
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bear-avhistory bear-avhistory is offline
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Stock I would go with BMW's recommendation & modified 25K miles. Agree with the guys who said do it yourself. You will save money even if you have to buy the tools & also learn something about your car by looking at the condition of the plugs you pull out. Another source of the plug tool $19 & plugs $11.50 each is BMS.
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  #12  
Old 01-06-2013, 01:39 PM
Tom K. Tom K. is offline
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Quote:
Originally Posted by unrealii View Post
Correction, OP has a turbo engine
No correction as that is what I posted. The 335i is either a twin or single turbo motor, depending on year.

Tom
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  #13  
Old 01-06-2013, 01:42 PM
unrealii unrealii is offline
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Quote:
Originally Posted by Tom K. View Post
No correction as that is what I posted. The 335i is either a twin or single turbo motor, depending on year.

Tom
I was referring to your comment that OP has non-turbo

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Last edited by unrealii; 01-06-2013 at 01:44 PM.
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  #14  
Old 01-07-2013, 06:17 PM
WendyS WendyS is offline
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Thanks for all the intersting input. I have read the plugs should be changed at 45k miles on the turbo. We were planning on having to buy a few new tools for this car, so it will be a spring job.
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  #15  
Old 01-14-2013, 12:10 PM
j_nolesfan j_nolesfan is offline
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Bosch OEM plugs are only $4.19 each at the local Advance Auto Parts. ~$25 + TX. Am I missing something when comparing them to the $79 from "fleaBay"? They will have to order them, of course. This will likely be my next DIY job after taking care of my leaky Trans.

Jeff
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  #16  
Old 01-14-2013, 01:09 PM
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bear-avhistory bear-avhistory is offline
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As long as its the same Bosch part # is on the metal ring below the insulator you are good to go. Only difference besides price is one says Bosch on the insulator the other says BMW.
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  #17  
Old 01-21-2013, 04:29 PM
Boraxo Boraxo is offline
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May do this soon as I am close to 90k miles. Dealer is quoting $375 though with 10% coupon that drops to $338. Indy shop wants $198+$20 per plug, after parts disc. that drops to $290.
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  #18  
Old 07-14-2013, 06:40 AM
WendyS WendyS is offline
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Finally changed the plugs yesterday. Special thanks for the Cobb video; it was very helpful. $93 for plugs, $60 for 14mm socket & torque wrench, and 2 hours on a Saturday afternoon. It was actually quite easy. Saved $250 and a trip to the dealer.
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Old 07-14-2013, 06:54 AM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by WendyS View Post
Finally changed the plugs yesterday. Special thanks for the Cobb video; it was very helpful. $93 for plugs, $60 for 14mm socket & torque wrench, and 2 hours on a Saturday afternoon. It was actually quite easy. Saved $250 and a trip to the dealer.

Road test result?? Post your review here!

.

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Last edited by CALWATERBOY; 07-14-2013 at 07:45 AM.
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  #20  
Old 07-14-2013, 07:24 AM
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bear-avhistory bear-avhistory is offline
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Quote:
Originally Posted by WendyS View Post
Finally changed the plugs yesterday. Special thanks for the Cobb video; it was very helpful. $93 for plugs, $60 for 14mm socket & torque wrench, and 2 hours on a Saturday afternoon. It was actually quite easy. Saved $250 and a trip to the dealer.
Way to go, Congrats.
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  #21  
Old 07-14-2013, 08:01 AM
WendyS WendyS is offline
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Quote:
Originally Posted by CALWATERBOY View Post
Road test result?? Post your review here!
I was having a minor issue with rough idle at start up, so I put Techron in 3 days ago and did the plugs yesterday (at 46,300 miles). So far the idle is definitely smoother. Took it for an 'agressive' drive after the plugs were done... possibly a little more responsive (I need more time to tell for sure). N54 must eat plugs quickly; they were all fairly corroded. Cylinders 3 & 5 were the worst and had a lot of carbon around the plug; not sure what that means.
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Old 07-14-2013, 08:16 AM
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thekurgan thekurgan is offline
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Quote:
Originally Posted by WendyS View Post
I was having a minor issue with rough idle at start up, so I put Techron in 3 days ago and did the plugs yesterday (at 46,300 miles). So far the idle is definitely smoother. Took it for an 'agressive' drive after the plugs were done... possibly a little more responsive (I need more time to tell for sure). N54 must eat plugs quickly; they were all fairly corroded. Cylinders 3 & 5 were the worst and had a lot of carbon around the plug; not sure what that means.
See if they match anything shown here:

http://www.ngksparkplugs.com/tech_su...qs/faqread.asp
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  #23  
Old 07-14-2013, 01:51 PM
Ilovemycar Ilovemycar is offline
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Quote:
Originally Posted by WendyS View Post
I was having a minor issue with rough idle at start up, so I put Techron in 3 days ago and did the plugs yesterday (at 46,300 miles). So far the idle is definitely smoother. Took it for an 'agressive' drive after the plugs were done... possibly a little more responsive (I need more time to tell for sure). N54 must eat plugs quickly; they were all fairly corroded. Cylinders 3 & 5 were the worst and had a lot of carbon around the plug; not sure what that means.
Hi WendyS, I just did mine too! I'm going to start a thread with a few pics, just to pick brains for fun as usual, because I do not know how to visually judge plugs as you do. I think cylinder 5 was a bit more stuck than the others, but I can't remember about #3... if I had to guess I think #6 was more like #5, making me wonder about the latter cylinders. Congrats to the both of us.
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  #24  
Old 07-14-2013, 05:41 PM
sandeepkarna sandeepkarna is offline
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Even i was quoted $420 for changing the spark plugs i have 37188 mi on my 2009 335i and the due was in about 800 mi.Here is the split price for each

labor price -284
part price -138 for 6
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  #25  
Old 07-14-2013, 06:27 PM
Lufthansa Lufthansa is offline
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I assume you meant 8000 miles?
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