Hi guys
My friend is in need of spark plug wires for his '86 745i, vin 0720902.
Would it be correct to assume that since the M106 is basically a B34 to use B34 spark plug wires or does it have to be M106 specific, BMW part number 12121705719?
Thanks
"Understeer is when you hit the wall with the front of the car, Oversteer is when you hit the wall with the rear of the car, Horsepower is how fast you hit the wall, Torque is how far you take the wall with you."
An '86 model should have an 875xxxx VIN or 1150xxx for Highline, maybe export models are different? I am interested if you are able to take a picture!
In any event, Motronic 745i has a sensor wrapped around the number one spark lead. This is critical for the knock and boost systems to function.
Car will drive without it, but not best way to go.
Last edited by Hit Man X; 11-22-2016 at 05:06 AM.
I make E23 parts.
09/1983 745i (stolen spring '13 around Houston, TX Achatgruen on nutria buffalo. 8481080)
10/1984 745i
11/1984 745i
11/1984 735i (10:1-265/6)
Ford, MB, and GM round out the pack.
"Understeer is when you hit the wall with the front of the car, Oversteer is when you hit the wall with the rear of the car, Horsepower is how fast you hit the wall, Torque is how far you take the wall with you."
B35 is on number six from what I remember and the connection is different...but signal output is the same best I can tell.
What is the problem with buying the proper set?
I make E23 parts.
09/1983 745i (stolen spring '13 around Houston, TX Achatgruen on nutria buffalo. 8481080)
10/1984 745i
11/1984 745i
11/1984 735i (10:1-265/6)
Ford, MB, and GM round out the pack.
"Understeer is when you hit the wall with the front of the car, Oversteer is when you hit the wall with the rear of the car, Horsepower is how fast you hit the wall, Torque is how far you take the wall with you."
How is the condition of your 'pulse generator' as BMW calls it on the 745i?
If still in operable shape, why not have a set of plug wires built? Or you could send the thing to Kingsborne for a set to be produced with your pulse generator.
If you want to do the B35 wire set swap, you would have to convert from the round plug to the flat unit. Signal output is the same best I can tell by examining schematics, but have not tested this.
http://www.kingsbornewires.com/product-p/12-7721.htm You could buy that and have them install your pulse generator on the number one wire. Kingsborne used to sell the 05/83+ Motronic wire sets, but I have heard from a few people that pulse generator is NLA.
I make E23 parts.
09/1983 745i (stolen spring '13 around Houston, TX Achatgruen on nutria buffalo. 8481080)
10/1984 745i
11/1984 745i
11/1984 735i (10:1-265/6)
Ford, MB, and GM round out the pack.
Neat, looks like a Japan market 745i VIN!!
I think those have a -024 or -025 ECU, pretty rare.
Still go with the above for plug wires, Kingsborne.
I make E23 parts.
09/1983 745i (stolen spring '13 around Houston, TX Achatgruen on nutria buffalo. 8481080)
10/1984 745i
11/1984 745i
11/1984 735i (10:1-265/6)
Ford, MB, and GM round out the pack.
I bought a set of b34 plug wires and twisted the boot off to get the pulse generator on to the new wires. It worked but it's not easy to get that boot off I used a pocket screwdriver to get between the wire and boot and loaded it up with silicone spray. Then I twisted the boot off.
Old topic but just in case - bought yesterday a NGK wire set (according to their catalogue for 728i - wires only, without the enclosure) and one of the wires has the boot removed to allow for installation of pulse generator - it's even mentioned in included manual.
NGK does make a specific set for 3.4 745i, part is RC-BW1104 / 44239. Cyl. 1 spark plug socket is removable for pulse generator. Price was 209 euros here in Europe, had already new pulse generator from BMW for ~80 euros two years ago.
Wires are bit longer than originals and don’t come with plastic case or rubber hat for coil wire. Installing pulse generator was snug fit on wire end, but did pass through after minor tampering of compressed connector.
Last edited by nikoor; 08-16-2018 at 05:13 AM.
BMW E23 745i 1983-86 with 3.4 litre turbocharged engine: http://www.turbobmw.com
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