E60 525 LOW MPG - 525d doing 30 mpg ? Help...
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  1. #1

    Byronic's Avatar
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    2007
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    E60
    Engine
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    LOW MPG - 525d doing 30 mpg ? Help...

    Guys,

    Can anyone help me please, I have recently bought an April 2007 525d just had the DPF replaced [not cheap] but I still have a problem with MPG as in I get approx 30.5 MPG, book says it should be doing about 43 MPG -ish combined.

    I get on average about 530 miles out of a tank, mostly motorway driving so I'm thinking it should be more, am I wrong ?

    Can anyone confirm this is under where it should be, the car was in a BMW site near where I work and they had it for over 2 weeks and still could not tell me what is going on with the mpg, does anyone have any idea what is causing my car to use more diesel than it should please.

    BMW say they cannot find any faults and started talking about cutting into fuel lines and putting in measuring equipt and such like for testing and monitoring the fuel consumption. I have totally lost confidence in this particular garage. I have had many BMW's over last 20 years but never been to a dealership as a result of all the horror stories one hears and now I have my own to tell !!

    I really don't think I got the service I paid for and am very reluctant to EVER go back to BMW and on the end of that I intend to make an official complaint as well as they clearly wanted my car off their site and out of the way in the end.

    I would really appreciate any advice anyone can offer.


    Thanks again and kindest regards,


    Byron.

  2. #2
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    simonsays's Avatar
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    I'd definitely say you should get far better MPG especially from motorway driving Byron however by my reckoning 530 miles from your (70 litre?) tank is slightly better at 34.4 mpg?

    My 1st thought would be how are the thermostats performing, you need to access the hidden menu via the instrument cluster and view the engines coolant temperature.
    this pdf may help BMW E60 E61 hidden menu OBC - mr-fix.info or you can watch the hidden menu being accessed here in this YouTube video https://www.youtube.com/watch?v=JkP0VEgyutw

    I suspect one or both thermostats are faulty and the ecu is overfueling to compensate , running rich with ruin fuel economy & has been associated with premature DPF failure ?

    Please let us know how you get on with this matter

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    Cataclysm (18-07-2017),Mike320msport (13-03-2017)

  4. #3

    Byronic's Avatar
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    Hi Simonsays,

    Thank you so very much for your advice, I will indeed check the video and come back and let you know how I get on.
    Really appreciate your help on this after a huge bill from BMW its daunting to think I'm still not there with the car yet.

    Once again thank you !!

    Regards,

    Byron.

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  6. #4
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    No worries Byron , you might want to think about using a BMW specialist for any future servicing needs as they charge a fraction of dealer hourly rates
    and being totally honest are probably far more experienced in working on vehicles of similar ages to your E60 and their foibles ?

    Looking at your location this thread may give you some suggestions Recommended Indy's in South Hampshire or UK wide Recommended Garages by County.


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  8. #5

    Ireal's Avatar
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    Hello. I have a 520du E60 from 2007 and with a tank (70l) I do a minimum 700 miles and 800 miles on a motorway. I had some issues with my car which increased the consumption, one of them is the EGR vacuum pump. I solved most of the problems myself so I can give you some advice on this.

    My suggestions are as follows:

    1. Throughly check all the hoses from the EGR system, I found on my car some holes and cracks in those rubber hoses which don't allow the EGR to function properly. Also check if your vacuum pump is working by removing the hose (with your engine on) and see if there is vacuum on it. If there is no vacuum or is intermittent, change the pressure valve (vacuum pump).

    2. Make sure the pressure sensor from the intake manifold is working properly. Sometimes it won't show on a regular error scan, so my advice is just to change it, it's about 60 from BMW (buy only genuine parts).
    This particular sensor is got a lot to do with the consumption since it will tell to the computer the pressure in the intake manifold and, if lower than normal, will increase the amount of fuel pumped in the engine.

    3. If you have white smoke coming out on the exhaust, check your turbo. It might be clogged or blocked.

    4. Make sure your EGR valve is not clogged. If you have a valve, clean it. If you have a electronic EGR (like me) make sure the EGR cooler is not blocked.

    5. Make sure you don't have any leaks in the intake manifold. I found on my old manifold a hole about half an inch, so I had to change the intake manifold. If your intake manifold is the one with swirl flaps (like mine) make sure they are still in place. Some BMW owners choose to remove those flaps since they were a big issue in the past causing many problems. Removing those flaps will increase the consumption with 10-20%, so I've heard.

    6. Change the air filter (if it wasn't done already). Sometimes this can cause an increase of the consumption.

    7. If your car got a breather filter, change it or clean it, it's quite cheap. Having a clogged breather will also cause an increase of the consumption since the oil vapours won't reach inside the intake manifold forcing the computer to push more fuel in the engine.

    8. Make sure the injectors are not clogged. Put some diesel injector cleaner in the fuel and drive around. If you know how to remove one injector, just do a visual inspection to see if they're still in good condition, otherwise they need to be changed, which is quite expensive.

    Let me know of the outcome.



    Sent from my iPhone using Tapatalk

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  10. #6

    Byronic's Avatar
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    E60 MPG Problems...

    Quote Originally Posted by Ireal View Post
    Hello. I have a 520du E60 from 2007 and with a tank (70l) I do a minimum 700 miles and 800 miles on a motorway. I had some issues with my car which increased the consumption, one of them is the EGR vacuum pump. I solved most of the problems myself so I can give you some advice on this.

    My suggestions are as follows:

    1. Throughly check all the hoses from the EGR system, I found on my car some holes and cracks in those rubber hoses which don't allow the EGR to function properly. Also check if your vacuum pump is working by removing the hose (with your engine on) and see if there is vacuum on it. If there is no vacuum or is intermittent, change the pressure valve (vacuum pump).

    2. Make sure the pressure sensor from the intake manifold is working properly. Sometimes it won't show on a regular error scan, so my advice is just to change it, it's about 60 from BMW (buy only genuine parts).
    This particular sensor is got a lot to do with the consumption since it will tell to the computer the pressure in the intake manifold and, if lower than normal, will increase the amount of fuel pumped in the engine.

    3. If you have white smoke coming out on the exhaust, check your turbo. It might be clogged or blocked.

    4. Make sure your EGR valve is not clogged. If you have a valve, clean it. If you have a electronic EGR (like me) make sure the EGR cooler is not blocked.

    5. Make sure you don't have any leaks in the intake manifold. I found on my old manifold a hole about half an inch, so I had to change the intake manifold. If your intake manifold is the one with swirl flaps (like mine) make sure they are still in place. Some BMW owners choose to remove those flaps since they were a big issue in the past causing many problems. Removing those flaps will increase the consumption with 10-20%, so I've heard.

    6. Change the air filter (if it wasn't done already). Sometimes this can cause an increase of the consumption.

    7. If your car got a breather filter, change it or clean it, it's quite cheap. Having a clogged breather will also cause an increase of the consumption since the oil vapours won't reach inside the intake manifold forcing the computer to push more fuel in the engine.

    8. Make sure the injectors are not clogged. Put some diesel injector cleaner in the fuel and drive around. If you know how to remove one injector, just do a visual inspection to see if they're still in good condition, otherwise they need to be changed, which is quite expensive.

    Let me know of the outcome.



    Sent from my iPhone using Tapatalk
    Hi There [QUOTE=Ireal;260925] , I just want to say thank you so much for that valuable information, I have booked my car into APM in Waterlooville and will pass on the info you have very kindly given. On top of all the other work done, your advice will be priceless in localising this fault further. The car is booked in end of March so I will let you guys know how I get on.

    Thanks again everyone for your help and support.

    Byron.

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  12. #7
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    Quote Originally Posted by Byronic View Post
    Hi There , I just want to say thank you so much for that valuable information, I have booked my car into APM in Waterlooville and will pass on the info you have very kindly given. On top of all the other work done, your advice will be priceless in localising this fault further. The car is booked in end of March so I will let you guys know how I get on.

    Thanks again everyone for your help and support.

    Byron.
    Any update on your E60 Byron ?

  13. #8

    Dieselfan's Avatar
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    Hi, I have a preLCI 525D E61 & display shows approx 26.4mpg BUT when I go into hidden menu it tells me that it is reading mpUSgallon - If I do full to full check it is actually 33mpg. I do mostly short and city journeys and am not known for my light feet!!
    I have done my stats a couple of years ago and still warm up fairly quickly & run at 88/90C when checked on hidden menu. Forgot to say that usually carry approx 100kg of trash in back as well. If anyone can tell me how to change units from USgall to Imp galls - or do I need DIS??

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