Is your N55 Powered BMW Misfiring? Watch this. 

I got that code today after changing out the tensioner pulley and cleaning up the vanos solenoids. I replaced all the o-rings on the vanos and the rings on the camshaft sensors. It ran terrible after the initial start, but then it warmed up and I took it for a drive. After I shut it down, I restarted and it cleared it self. I'm getting close to 58K miles, I'm gonna hold out until I hit 60K for the spark plugs. I already have all the parts for the walnut blast too. Great content bud, keep it up!

You should add x5 f15 spark plug replacement to the title. Will be very beneficial to those looking for a video on that. (I was looking for one lol) Great video btw.

My experience is the plugs( NGK's in Europe) last only for 60k mls without problems at these engines. And the coil packs(Delphi ones) will last for max 110k mls. After that, they start getting misfiring. You will see the brown spark traces on the white part of the coil packs when they are bad. Thanks for this footage. Keep up the good work.

Love you videos on the N55 which helps me a ton when diagnosing & fixing my F10 535i M Sport Bimmer. Will replace old spark plugs new Bosh OEM's as im getting random misfires and mostly on cylinders 4 & 6 only when i drive it on Sports Mode & try to haul ass! lol. Will also clean the map sensor just in case to make sure everything is ok! Love having all the necessary proper tools for this car as they not only save a ton of money fixing it myself but saves huge amounts of precious time!

Great video, I just finished a complete service on my X5 F15 not to include the spark plugs which I’ll be doing soon, I like how you explained the process. Something that I did on mine that made a huge difference and I would highly recommend is do the Liqui Molly Cera Tec engine treatment. The famous click-click-click BMW engine noise was reduced by about 80% I can now hardly hear it when I start up my engine cold.

Thank you for useful video! Nice diagnostic video! I have 2013 135is (N55) with 73k miles! Thank you again!

it works 100% !! On my n55, the same problem, and the same solution,thanks for your video. 10x bro

Had the same problem with my F10 535i M Sport beauty, multiple misfires on cylinder 2, 4 & 6 but all the time was cylinder 4. Just install brand new Bosh spark plugs and cleaned the coils one by one. Coils 2 & 6 looked burned with carbon all around inside and outside the coils. But all spark plugs looked burned and old and looked original BMW Bosh as if the previous owner never changed them. Well installed everything drove for a test drive. Slapped the Sport mode and hit the gas! Woohoo this bad boy was growling like a beast! I had full power what a huge difference. No more misfires! But i will change the coils as i dont trust them from how they looked. My MAF sensor looked clean and ok but also sprayed som le cleaner on it just in case. What i did notice that i dont like after in replace the plugs is the i begin gearing a tick tock like one of the valves was clicking. Made it sound more like a diesel but the Valve Cover really needs replacing as it leaking oil which equals some sort of vacume leak and when i accelerate i hear some kind of whistle, seems the CCV is bad which is more of a priority to replace the valve cover all together! Also need to replace : The Serpentine belt + tensioner+ pulley. Replace Differential oil with new gasket. Replace the windshield cowl assembly. Replace the blower's mesh that's under the Cowl. Replace front top window trim and rear window trim. Flush old oil and do a full oil tune up using Liqui Moly's Moligen (green oil) Bleed the breaks with fresh new Dot 4 fliud And finally, that's a maybe... change transmission oil as i think its making my car jerk a bit when slowing down as it feels the car hits the breaks suddenly by itself, very damn annoying!!!

Great content! I feel more reassured how to troubleshoot problems from all your videos

Put N55 spark plug change in the video title. This is the best tutorial on spark plugs change yet it doesn't pop up when you search. Thanks for the video.

Buddy thank you for sharing those videos and for sharing your knowledge don't videos are very helpful

Great freaking idea, i wanna go try this right now but id wake up everyone in my complex! You are absolutely correct about the adaptations, i haven't tried that!! thank you brotha, my car 550i is running like crap, after my plugs, but i think your on to something, iIll be outside at 6 AM waking up the neighborhood...hell ya.

About a third of the comments on here make me wonder if they are even watching the video. Do you guys just read the title and then post your ignorance on the subject? JFC, this man deserves a medal for the content he provides.

2013 x5 n55 misfire cylinder 1 and 2. got the special socket and proper plugs. takin a break and working on plugs 5 & 6 and about to put it all back together. hope the coils are good and the new plugs does the job!!

excellent job you saved me a lot of money with your video

Di-electric grease is supposed to be applied to the ceramic stalk of the spark plugs, not the boot itself. The grease will interfere with conducting if it gets on the metal tips of the spark plug. To be safe and have better longevity, take out the plugs, clean the metal tips, and clean the inner metal parts of the coils, then re-apply the grease on the ceramic stalks of the plugs only.

Any idea on what type of torqx screws those 3 are in the back left of valve cover holding down the cabling on top of the foam? I lost a few of min and can’t find part numbers!

Good stuff brother! I wish I was savvy under the hood! I've had my 2011 335i for two years now! Got the plugs replaced right away! Took to a BMW dealership and they broke me off! Lol. It just turned 60k. Got it at 53k. Don't drive it very much! Like to know more about That app you use to check codes! I know a bit more about what to look for! Keep it coming bra!

Thank you so much for the info.

How do you compare reliability of your E70 vs F15 ? My F15 is now out of warranty, I really love the vehicle but it concerned me a high ticket repair bill. Thanks for your inside and videos!

Just cleared all codes, which were many and unplugged the MAF sensor as you have shown. Started the car and it ran smoother, but back to my original issue of a P305 code and since I replaced all plugs and coils I would think it is the injector at this point. It did give me the MAF code, but also the IAT sensor code?

"OPEN LOOP" mode is when ECU is missing data (cold O2/Lambda etc) "CLOSED LOOP" is when ECU is able to measure the engine mixture and bring it to target "14.7: 1 ratio" - It uses the "FUEL TRIM" short/long corrections...

Great video! Thank you

Did you install the Eldor ignition coils with no problem? Is it noticeably better?

I had a P305 misfire on my 2011 535xi. The car has 119K on it and never had the plugs or the coils replaced, so I replaced just the coil on #5 and no difference, so I decided to change all plugs and all coils. Now I had a smoother misfire........Now running like shit and multiple random misfires etc. I was leaning toward injectors, but hey this is definitely an easy try. Thanks for posting. I will report back in after I try it tomorrow morning.

Did it stay running smooth or did it start misfiring again eventually? I have same symptoms but eventually the trims get skewed. High positive trims and rich AFR. Maf unplugged it runs good wot and cruising. But negative trims at idle. My theory is it's a bad injector(s). #1 plug smelled like E50. With maf connected it's getting more fuel than it expects, which causes misfire, which then commands more fuel, still just as lean so then throws more fuel at it...until the garage smells like fuel. The DME injects more fuel for that one cylinder until it's tripping over itself. With maf disconnected it runs great because it's not increasingly adding fuel. And idle it is pulling fuel. Which it would do if an injector is squirting too much in. Also it's able to stay closer to 14.7:1. Again, MAF plugged in it was commanding more (+trims) but actually running rich. Anyways, that's my theory.

I'm having the exact same issue, started with 6th, and now it's 5th as well. Tried your method for a bit, engine idled a bit better but code kept coming back. Only ran it for a minute and nothing. Will try longer to see if that does anything

Great video and informative, keep up the great work! 😊 What Diagnostics Tool are you using and I'd love something more mobile friendly then my Ancel BM700 or my BlueDriver Bluetooth I've used for years. Both work on 2012 BMW x5 e70, but BlueDriver doesn't provide reset for features for Batter or otherwise like Ancel OBD2 interfaces.

Thank you information was very helpful

I have both BMW X3 F25 and X5 F15. I have done ignition coil and spark plug replacements in my X3 already twice, but not yet in my X5. X3 was a lot easy. Just removed engine cover and that was it! But with the X5, geez, this is a lot of work just for the spark plugs!

This video really helps even in 2024! BTW, it would be much appreciated, if you can share what specific scanner you used. Thank you so much for sharing it!

Have a 2012 335i (N55). Same thing happened when I changed my plugs. Got a 5 and 6 misfire and sometimes a HPFP code.

I believe the interval is 40k for plugs. 60k is fine if you do a lot of highway driving.

Hey what scanner are you using here ???? or could you please recommend one ???

Great Video!! ty for invaluable information! 100-100

Is the dielectric grease just to help the boot slide on or does it serve another purpose? I didn’t use it when I recently changed my plugs. Great video. Thanks.

I like your logic thinking.

What scan program are you using

Too scared to get a n55 X. Good Luck!!

Was having misfire on cylinder 4 all the time and one time got multiple misfires 9n cylinders 2, 4 & 6. Coils looked a bit worn and burn but decided to just change the OEM spark plugs first and yup that was it! Old worn-out spark plus was the misfire issue! Problem solved... - 2014 BMW 533i M-Sport!

Thank you for video and I have question BTW. My BMW has a 2.0 petrol engine N55. Some of the BMW user say there should be a difference when car runs with and without MAF. I have noticed my car runs without any difference when sensor is on or off. Is this normal?

My N55 is going into limo mode code 36C9 any idea it coukd be? Im thinking boost solenoid

I can not believe it. I did exactly what you mentioned and it works like a charm. How did you clean the MAF sensor. Great video!!!

What year is your X5?

amazing vid, thank you

Hi, thanks for your job. I'm still have problems in my N55 engine after i changing the new spark plugs ( before that everything is fine ). So i have a question. Do I need to clear DME code because I didnt have a devices to solve this? May I just disconnect MAF sensor and start engines running, and after that reconnect MAF sensor? Please help. Thanks for your advises.

What is the diagnostic app that you are using?

Very interesting video, but this is exactly why I would not buy a used vehicle that wasn't serviced at an authorised dealership. That "service due since 07/2017" is just a clear sign of staying the hell away. Nevertheless nice to see someone working on these cars.

ill try this tune up, other than that I might just get my high pressure fuel pump

it went to a different map ignoring fine trim OPEN loop not closed. anyway i wonder if the MAF does force it to a readapt. hmmm.

BMW guru, please help. I took off 1 spark plug and put it back and now the engine is jerking but no code. Got brand new coils and plugs have less than 5k on them. Where do I start ?

what app are you using?

Currently having these issues but it’s after putting non oem plugs in. Got some Bosch, going to swap them out and see if it fixes the issue. Haven’t been able to enjoy my 535i for almost 3 months so hoping this works.

Do you have a recently installed K and N air filter or another oil soaked filter. This could be the source of the dirty MAF

😂love you bud, but I wonder if the next morning you started the car and you were back at the check engine light again

Ive the code cf1541 did u know what it is? Its on my n55 435ix

if you stick a penny in 3 of the tabs on the breather hose then use a screwdriver to wedge the bottom tab you can pull the breather hose out pretty easy. if its stuck just wedge a penny in and twist and it pushes free. the pennies dont fall out either from all of the times i done it that way, and wont break the clips when they get brittle.

Had the same exact issue today , but per troubleshooting found that ignition coil on cylinder 1 went bad @ 53k

Wait you need to do all that to change the sparkplugs? Brilliant design!

thank you, but what the scan tool you use?

"I have seen it done in 23 minutes" said the customer

Ahh hell no! All that trim for spark plugs. I'll stick with my N54 E60 thank you very much.

Hey! I have a question for you. I have a 2007 bmw e90 335i (06/07 build date) and both of my key fobs stopped working. I have don’t have comfort access. My central locking system still works perfectly fine when I use the physical key out of the fob or the lock button in the center of the dash. I replaced fuse #57 for a 20 amp and still no luck. I also have tried charging the keys by taking a long drive with no results. If you have any knowledge of this issue I would greatly appreciate it! Thank you so much in advance!

Thank you Sir for your video. This is exactly what happened to my 15' F13 with only 35k miles. Changed plugs and coils, same issue returned after a week. Ended up towing it to the dealership, they replaced plugs and coils...again; and after driving it for two days it returned. It is now...again...at the dealership for rework and they're looking at injectors. Who knows what else is wrong with it. Any additional ideas or tips so I may relay to these guys? Thanks again for a great video.

What’s the name of that obd/bran ur using

what scanner do you use?

I have the same codes on f15 2015 100,000 miles, I already replaced the hpfp and sensor rail what a PITA, and still doing the same I'm going to do the plugs first to see if that fix the problems, before watching your video I was about to buy the fuel pump and sender from the gas tank almost $500.00 dollars, but let's see what happens with the plugs first, going crazy with this S$#.T

Hpfp might be be the cause..check the pressure.if its under 400psi its the hpfp

What app are you using?

Did you replace the spark plugs with Bosch or NGK ?

I appreciate the video so much. But I still get misfire on cylinder 3 even with new coil and spark. The engine still shakes Please help I’m about to give up. Anyone please give advice I would gladly appreciate🙏🏽

I hope people are buying their plugs and coils from FCP EURO. Just got mine OEM all 6 plugs and all 6 coils for $240 with lifetime warranty. Installed myself super cheap tune up!

I am getting same thing same symptoms on a specific cylinder on a B48 tuned bm3 ots Fault keep coming back Did the plugs , swapped coils Will try the MAF removal u did fingers crossed

How about just cleaning the MAF?

Can you help me my BMW X3 have a code p112f can you help me thanks

20:20 Does the engine normally tick like that ? Possibly the camera mic overly picks it up ?

This is open loops. Disconnecting MAP/MAF sensor is putting ecm to run on basic setting without any sensor input.

Changed sprkplugs and coils missfire cylinder 1 gets missfire and goes away comes back ..

What is the make model of scanner you used or the app scanner on iphone?

Usually it's either the spark plugs or the ignition coils causing the misfire.

All that disassembly just to get to the spark plugs?? Wow

I've heard few n55 engines, all sounded different.

Which app are you using to read the error codes?

My car is doing this just changed injector on cylinder 5 and programmed it and still running like crap

Man your wife is lucky because usually she would go the dealer and have them charge her a ton of money lol. they would of told her she needs all new top end.

Hi guys I have 2013 bmw series 528i xdrive today I has P17F2 BMW - Ratio Monitoring Clutch 'A' and 'B'

What scantool are you using

Is the engine tuned?

Hey, would you be able to assist me? I have a m235i, having a issue with cylinder 4, getting the following code: 112409 Cylinder Injector 4, Control: Line Break

Damn man I have a 740li Msport and this seems like exactly what my car is doing

Dude I got my spark plugs changed at 60k and 2 days later nothing but misfires on my n55. I'm gonna try this MAF on/off and reset adaptation

That's crazy!! All that work to replace spark plug🤦‍♂️

Put a coil pack in Thats all It need

Your fuel injectors are going out..

If that check engine light is blinking Ike that you need to shut your engine off immediately....!! That blinking means your cats is getting destroyed...

Holy fucking shit newer bmws are shit.

Mr. Joe child-man what you did to the spark plugs? Tightening spark plus only by gently tight Not how you doing Mr. AAAAAAA

Your first screw up was buying non oem

This is what happens when you buy a used BMW with 98k...They are cheap at that mileage for a reason

Can you talk less in your videos ? As some people want to associate the actual sound of the engine with theirs, and i cannot listen to the engine note to check if is the same like mine. Amazing video! But i dont know how is that engine sounding like a missfire