Coil Update

[spooltime]

My spark plugs are due for a replacement, so it might seem like a good time to throw in a fresh set of coils in order to avoid potential duplication of labor down the road.  My engine presently has no coil-related DTCs, and currently has the "20" version of coils in it.  In perusing the Porsche parts catalog, I note the coils for the 955 Turbo Cayennes have been updated twice since my prior coil replacement, and are now number 948 602 104 22, with "21" coils being offered for a period of time.  The equivalent Beru (OEM supplier of the Porsche packaged coils) coil part number is ZSE 012, but Beru's part number cross-reference only goes up to the "20" coil, which I already have.  That makes me think I would be better served going with the Porsche-boxed coil since it might be an improved version over the "20" version or corresponding Beru ZSE012.

 

So my question is really whether the Porsche part number update really means that the part is updated or not.  I've always understood it does, but I'm open to education on this topic since the price for the Porsche coils exceeds the price for the Berus by a not insignificant amount per coil.

 

Anyone know if it's really worth getting the most updated Porsche part number or not?  Or if the "if ain't broke, don't fix it" rule also applies for coils.  I must say that when I replaced my "09" coils with the "20s", I haven't had a coil related issue since.

[lewisweller]

6 hours ago, spooltime said:

My spark plugs are due for a replacement, so it might seem like a good time to throw in a fresh set of coils in order to avoid potential duplication of labor down the road.  My engine presently has no coil-related DTCs, and currently has the "20" version of coils in it.  In perusing the Porsche parts catalog, I note the coils for the 955 Turbo Cayennes have been updated twice since my prior coil replacement, and are now number 948 602 104 22, with "21" coils being offered for a period of time.  The equivalent Beru (OEM supplier of the Porsche packaged coils) coil part number is ZSE 012, but Beru's part number cross-reference only goes up to the "20" coil, which I already have.  That makes me think I would be better served going with the Porsche-boxed coil since it might be an improved version over the "20" version or corresponding Beru ZSE012.

 

So my question is really whether the Porsche part number update really means that the part is updated or not.  I've always understood it does, but I'm open to education on this topic since the price for the Porsche coils exceeds the price for the Berus by a not insignificant amount per coil.

 

Anyone know if it's really worth getting the most updated Porsche part number or not?  Or if the "if ain't broke, don't fix it" rule also applies for coils.  I must say that when I replaced my "09" coils with the "20s", I haven't had a coil related issue since.

If your on 20's without any issues I wouldn't waste your money. Get a good set of ngk plugs like Bkr7eix and save the coil money for some other future maintenance or repairs.