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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > E90 N55 Spark Plug Part Number



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      02-09-2015, 02:05 AM   #1
princelybug
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E90 N55 Spark Plug Part Number

I tried to search, but couldn't find the answer to my specific question(s) regarding Bosch spark plugs for the E90 N55:

1. Bosch part # ZR5TPP33-S R6
2. Bosch part # ZR5TPP33 R8

I know #1 is the proper OEM plug for my car.

1) What's the difference between #1 and #2 (R6 vs. R8)?
2) Will there be any ill effects if I were to use #2 vs. #1?
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      02-09-2015, 11:26 AM   #2
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After doing some research, it looks like the heat range (3rd digit of part number-5) is the same for both plugs.

Does anybody have any insight on what the "-S" and "R6" or "R8" in the part numbers represent?
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      02-10-2015, 05:30 PM   #3
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I ended up calling Bosch tech support @ 888-715-3616. I was told the "R6" or "R8" at the end is just a manufacturer's code (I'm guessing batch number or something similar) and doesn't signify anything I terms of the plug itself. I was told both of the above plugs are one and the same.

The "-S" however, does signify something. It is an updated version of the original plug. The "S" model has an updated "ground strap."

That's the answer to a question no one's asked other than myself. Cheers.
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