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Thread: Bosch Ignition Coils - new

  1. #1
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    Default Bosch Ignition Coils - new

    BMW p/n 12131286087 round type, aka rod-type
    Part 12131286087 (Ignition coil) was found on the following vehicles:
    E23: 733i,735i,732i,735i, 745i
    E24: 633CSi,635CSi, M6, M635CSi
    E28: 528e,533i,535i,M5,525e,520i
    E30: 325e,325i,325ix,M3,320i,316i,318i,320is
    E32: 735i/L,750iL,730i/L M30B30,
    E34: 525i,530i M30B30, 535i,520i,518i
    E36: E36 316i Sedan, Europe,E36 318i Sedan, Europe

    Also used in the first built years E32 750 with M70 V12, here a picture from a 1987 750i engine bay http://img1.auto-motor-und-sport.de/...a33-303169.jpg

    $60/piece, plus shipping
    Shipping Weight approx :3 lb.


    Bosch ring type ignition coil
    for cylinders 7-12 on M70 engine E32 750, E31 850, BMW p/n 12131742926

    for cylinders 1-6 12131742925, Part 12131742925 (Ignition coil) was found on the following vehicles:
    E31: 850Ci, 850CSi
    E32: 750i/L,730i/L M30B30,735i/L,750iLS
    E34: 535i, M5 3.6,520i,525i,530i M30B30,
    Z1: Roadster, Europe

    $70/piece plus shipping
    Shipping Weight approx: 3.00 lb.

    Please contact me by PN with country and zip code so that I can inform you total including shipping, I will select most economical shipping cost, unless you want to have it superfast.
    Last edited by shogun; 03-24-2016 at 08:55 AM.

  2. #2
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    What happens when a coil dies..... copied from an E31 forum:Had an owner have his 1991 Canadian spec 850 towed here as it was running on 6 cylinders. Car has around 230k kms (142k miles) on it. Ultimately discovered the passenger side coil had spilled its guts and self destructed as shown:
    http://i171.photobucket.com/albums/u...4/IMG_0374.jpg
    Which in turn, took out the corresponding DME:
    http://i171.photobucket.com/albums/u...4/IMG_0375.jpg
    Once both replaced, car started on all 12 but on road test, idle wouldn't drop below 1000 rpms and car was surging violently. Replaced EML and all is now better. This is not the first puking coil we have seen up here that has taken out a DME as well but the first to affect the EML. Perhaps a cautionary maintenance replacement of the 25 year old coils may prevent this expensive failure.
    -------------------------
    Just as a follow-up. This was not an isolated case - it was the 5th E31 that I have had to do this diagnosis and repair on over the last couple of years. Other 4 were lower mileage J-specs and a US spec 6-speed car. I don't mind as I have plenty of coils and DME's on hand at the moment but I strongly urge you to replace your coils as a maintenance item. Using either OEM Bosch or aftermarket MSD 8207's will provide a stronger spark than your tired, worn out 20-25 year old OEM coils, improving reliability and even fuel economy and... maybe eliminate the additional cost of DME/EML replacement as well.... just my $.05 worth.
    -------------------------
    What would you gents say is a good safe interval? From my recent fuel pump conversations it was suggested fuel pumps get replaced approx every 10 yrs as maintenance items. Would you say half that for coils? 5 yrs despite mileage?
    ------------------------
    I have replaced at 35,000 - 40,000 miles. That works out to every 18-24 months.
    ---------------------------
    These pics I got from an E32 owner in Germany from an E32 750 showing similar damages to the ignition coils
    http://produkte.bilder-speicher.de/1...il-defect.html
    http://produkte.bilder-speicher.de/1...il-defect.html
    But, they are >20 years old, so the quality was good. Why not change the original ignition coils every 10-15 years. I will stick to Bosch.

  3. #3
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    New ones on stock, especially BMW p/n 12131286087 round type, aka rod-type
    Part 12131286087 (Ignition coil) was found on the following vehicles:
    E23: 733i,735i,732i,735i, 745i
    E24: 633CSi,635CSi, M6, M635CSi
    E28: 528e,533i,535i,M5,525e,520i
    E30: 325e,325i,325ix,M3,320i,316i,318i,320is
    E32: 735i/L,750iL,730i/L M30B30,
    E34: 525i,530i M30B30, 535i,520i,518i
    E36: E36 316i Sedan, Europe,E36 318i Sedan, Europe
    Last edited by shogun; 09-02-2016 at 03:36 AM.

  4. #4
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    @William: 1 x Bosch ring type ignition coil for cylinders 7-12 on M70 engine BMW p/n 12131742926 + 1 x for cylinders 1-6 BMW # 12131742925, 12131742925 shipped to Perth, Australia

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