Bosch spark plugs

M535i

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Oct 3, 2019
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2010 535i
I've got a set of Bosch ZR7SI332S 9710 plugs for my n54 but can't seem to find many using them, I think their the same as ngk 5992/95770, anyone using them?
 

M535i

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Oct 3, 2019
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2010 535i
No one using them or used them? It says not to gap but if the same plug as 5992/95770 I'd like to gap down from .27 to .22.
 

Rob09msport

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Oct 28, 2017
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Single electrode I would gap them def. Ive used ZMR5TPP330 and the zr5tpp33s before I honestly didn't have great luck with them I was leaking through insulator on 1 in both sets
 

naschine

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May 2, 2019
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135i N55 DCT
I've got a set of Bosch ZR7SI332S 9710 plugs for my n54 but can't seem to find many using them, I think their the same as ngk 5992/95770, anyone using them?

They're definitely not the same. The 7 indicates the heat index, which is 1 step hotter(!) than the N54 OEM Bosch plugs (ZGR6STE2). NGK 95770 are about one step colder than OEM N54. You'll want some Bosch with an index of 5 for the same heat index as the NGK 95770 (ILZKBR7B8DG - NGK's heat index 7 equals Bosch's 5). For Bosch plugs the lower the number, the colder they are. NGK it's the opposite, the higher the number of their index, the colder the plugs.


Single electrode I would gap them def. Ive used ZMR5TPP330 and the zr5tpp33s before I honestly didn't have great luck with them I was leaking through insulator on 1 in both sets

Both ZMR5TPP330 (OEM S55 and M2 N55 - the M in the name indicates they are for M cars) and ZR5TPP33-S (OEM N55) are not produced anymore and superseded by ZR5TPP330 and ZR5TPP33 respectively. Production ceased 01/19 and only remaining stock is sold.

ZMR5TPP330 vs ZR5TPP330 = the middle electrode's diameter is different -> 0.8 mm vs 0.6 mm
ZR5TPP33-S vs ZR5TPP33 = interference suppression resistor is different -> 8 kOhm vs. 6 kOhm

Other than that, the spark positions of all mentioned plugs are different!

Spark plugSpark position
NGK 95770 (ILZKBR7B8DG), ZGR6STE25 mm
NGK 97506 (SILZKBR8D8S), ZR5TPP33-S, ZR5TPP336 mm
ZMR5TPP330, ZR5TPP3307 mm
Sorry if any termini aren't exactly right, I had to look up some words ;)
 
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seb.apprenti

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Nov 28, 2018
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Hi guys . since the time, opinions on the ZMR5TPP330? I have the Hydra hp650, sp95 (eur) + 1500cc 100% meth eldor m4 type ignition coils and bosch oem type spark plugs. Last night for the first time I had a misfire. I think I should change my type of spark plugs. I want to try the Bosch ZMR5TPP330 because I'm not convinced by the ngk