X3 E83 (2.0 Diesel 2007) N47

[Jaiminho]

Hi all, I've persistent error codes 4A74 and 4A79 on my X3 E83 2.0 Diesel 2007 N47!! after timing chain kit replacement, glowplug + glow plug unit. The car cranks very well but won't start, codes reappear as soon as they are cleared.

Any help will be very appreciated..

[Bimmer Owners' Club]

Hi Jarmisson....welcome to the Forum

It appears that the Glow Plug Control Module is usually at fault when these codes appear.

Also check for chaffed wiring leading to or from the moduel

http://workshop-manuals.com/bmw/3_series_e90/320d_n47_sal/2_repair_instructions/12__engine_electrical_system_(n47)/21__preheating_relay/1_ra__replacing_glow_control_unit_(n47)/

Let us know what you find

Cheers  Trevor

[Jaiminho]

Thank you so much Trevor, I replaced the glow plugs unit relay by a genuine and disappeared all the error, so no more fault codes stored in the ECU but still not start, tomorrow I'll get a Bosch brand new battery.. When I turn the key to position two I never hear the fuel pump, is it normal for it not making any noise?

Any help will be much appreciated

 

thanks

Jaiminho

 

[Bimmer Owners' Club]

Probably won't hear the lift pump but definitely try a new battery as a faulty one can definitely affect the electronic systems

[Bill13]

Hi all.. I don't on't usually write posts but I thought this may help.. 

I Had fault codes 4a79 and 4a74.. Which indicator a Problem with glow plug module or glow plugs themselves.. I change all the above and codes still not clearing so I look into any other codes that may be stored on the car.. I had a fault code that pointed towards the aux water pump which works the rest function on you ac unit.. I unplugged the pump.. Gave it a wiggle as I put it back in.. Cleared that code and then I was able to clear the above codes which I know has cause many people problems.. Hope this is the case for others on here and how this helps 🤞🤞

[nikz3]

Have 2008 X3 E83 N47 2.0 diesel nonstop problems since i purchased it second hand xmas of 2020 with 3 mths guarantee and a month later problems started.

Had it checked and inspevted first time by sytner as i had noises coming from bottom while in slow traffic. Felt like everything was banging about setting off very  slow and slowing down at low speeds. They found a driveshaft not even connected to diff. All fixed and replaced incl thee sideshafts, oil leaks fixed. Within a week still had same noises but also fetl like misfire or a bicycle chain jumping sprocket when pulling away or slowing down at slow speeds.

Back to sytner for a check and a test drive from the "experts". this time found vertical front suspension strut on either side plus a front left ball joint the culprit for bangs, noises and the feeling that the bottom and top of this car were coming apart. Nothing about the misfire and stuttering when pulling away or slowing down. i was however informed of a rear sideshaft outer boot which was leaking grease and split as leaking grease evident. 

I replaced both struts and balljoint as directed. On getting ready to replace sideshaft with greaseless boot found boot perfect with visible grease from a previous replacement which mechanic failed to clean up after.

i even replaced an injector some other "BMW Specialist" diagnosed as the misfire problem.

And today £5000 price and over £2500 repairs and guess what ? still not sorted. Even the agents cannot diagnose the correct repairs but pluck at straws. 

Am very close to setting it alight as a charity bonfire to get some value from it.

Sold my old Pajero after missus bugged me to upgrade to a decent car !!

Guy refuses to sell it back to me.

Had a 125 Bmw scooter lasted 2years and done 26 000 miles without a hiccup and sold to as courier.

Still got my almost newly bought 1997 Z3. Engine runs smooth as silk just replace body and suspension parts periodically. Easy to work on, less silly electronics.

Been in different Beemers from TI's, box shape 320, 318I, then Z3.... used to promote as best value second hand vehicle ..... no more..... never have i regretted buying a car so much.

Most probably use Z3 this week then take it back to Sytner for another eenie, meenie, mynie ...mo diagnosis and see what the "specialists" come up with.

Nicolaas Zaayman

Coalville, Leicestershire

 

 

 

[Greydog]

Nic

Welcome to the Forum

By the fact you had 3 months Warranty you purchased from a Dealer

If so you still have protection under the Sale of Goods Act, ask the supplying Dealer to either Fix it Replace it, or Money back (talk to Citizens Advice)

Dave

[nikz3]

On 10/15/2021 at 7:53 AM, Greydog said:

Nic

Welcome to the Forum

By the fact you had 3 months Warranty you purchased from a Dealer

If so you still have protection under the Sale of Goods Act, ask the supplying Dealer to either Fix it Replace it, or Money back (talk to Citizens Advice)

Dave

 

[nikz3]

Thanks for the reply Dave

 Those 3 months of the guarantee are long gone Dave. You could say i missed the boat as far as that is concerned. Had loads of personal problems and work commitments in that time so time elapsed too quick to respond in time. 

Just got some fault codes from diagnostic to unravel and act upon:

452 Particulate Filter System 

4B1C Fuel Filter Heating Activation

4530  Charge Air Pressure Control Small Turbo Control Deviation

447B Oxygen Sensor

Any advice will be welcome. 

Nic Z

[Greydog]

Morning Nic

First the Sale Of Goods Act isn't time ltd A lot of Dealers will provide a "Warranty" (often included in the price so you probably paid for it) it is an insurance that protects them as much as you. Under the sale of Goods Act they have a responsibility to provide goods "suitable for purpose" as your issues began soon after sale they clearly haven't.

However your Fault Codes

Often fault codes are linked, they are also often a symptom not the cause.

452 Particulate Filter System     The Particulate filter has 2 temperature sensors and an O2 sensor mounted on it I would get them checked if you cant DIY 

4B1C Fuel Filter Heating Activation     There was a Recall by BMW for this issue make sure yours has been done

4530  Charge Air Pressure Control Small Turbo Control Deviation    Check the vacuum lines and actuator also good old WD40 on the turbo actuator to make sure it moves freely.

447B Oxygen Sensor      If your O2 sensor has become sooted up and failed the first fault could be linked 

I would put pressure back on the Dealer the least you may get is them sharing cost (though I would push for more)

Good Luck 

Dave