[Dawgz]

Originally Posted by Sophisticated Redneck

Just found this:

8179 (ZMR5TPP330) has recently been superseded to 8165 (ZR5TPP330). Catalog is still showing the 8179. The main difference (besides the “M” in the type formula designating the BMW “M” series vehicles) is that the 8179 has an 8mm diameter center electrode; the 8165 has a 6mm diameter center electrode. The 8179 has a couple of fewer threads at the foot of the housing versus the 8165 - but all of the other critical dimensions are identical. Both spark plugs are indexed (meaning they must be properly tightened by torque wrench; torque specs are printed on the individual spark plug package - no hand-tightening to “xx” degrees otherwise spark plug and/or engine damage could occur) Also, important to note that the customer should not use anti-seize; as this can cause over-torqueing (spark plug and/or engine damage could occur).

Engineering approved the supersession for the IAM, so the customer can be assured about using the 8165 if the 8179 is no longer available at his parts store.

Regards, Thank You, Bosch Automotive Aftermarket Parts Hotline

Oh wow