[Gr-Racing]

What spark plugs are you guys using?
their is alot of different ideas on what plug is best, about to do mine.

[Wires]

OEM plugs are Bosch, with a BMW logo stamped on them (that adds 2x to the price due to the expensive ink )

Just find the Bosch P/N plug and use them. They are no better/worse than the rest.

[Adamr916]

Spark plugs? What are those? Lol, my car doesn't have those.

[Wires]

Bahh... inferior glow plug vehicles.

[Gr-Racing]

Im kinda lost on this one guys, let me in on the joke. Plz

[eluded]

Originally Posted by Wires

that adds 2x to the price

So true. Take what one would estimate to fix the BMW and multiply by two or three.

[Wires]

Originally Posted by Gr-Racing

Im kinda lost on this one guys, let me in on the joke. Plz

Diesels use a glow plug that heats up and causes the engine to fire, gasoline engines use a spark plug to light it once per fire.

[John in VA]

Originally Posted by Gr-Racing

Im kinda lost on this one guys, let me in on the joke. Plz

BMW specifies: Spark plug, High Power - BOSCH ZR5TPP33S, part # 12120037582. MSRP $22.74, but you can find them through BMW dealers with internet sales for ~$14.50.

You can find them online for ~$10 each. http://www.ebay.com/itm/ZR5TPP33S-for-BMW-F01-F02-F07-F10-135i-335i-435i-550i-Spark-Plugs-Bosch-6-PC-/232131945510?hash=item360c246426:g8IAAOSwal5YGf5 O&vxp=mtr

The NGK 5992 (ILZKBR7A-8G) is, apparently, another option. BMW used NGKs in the E46s, and I've run them in my 2002s for 30+ years.

[Billfitz]

Originally Posted by Wires

Diesels use a glow plug that heats up and causes the engine to fire, gasoline engines use a spark plug to light it once per fire.

A plug fires on every ignition stroke. A glow plug is only necessary for the first revolution or so, then the firing is caused purely by compression. That's what makes a diesel a diesel.
For that matter a glow plug isn't a necessity, but with a cold engine it would take a lot longer to initially fire up, perhaps longer than the battery could provide cranking power in very cold weather.

[Wires]

Yes, you are absolutely correct. Should have expanded on that. Diesels work by compressing air/fuel enough that it just ignites. Cold fuel sometimes needs help to ignite, so the glow plugs kick in for starting as a helper.