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Is it really because one says Porsche or something? It's nearly triple the price....
Thanks!
The expensive one - the plug will still say Bosch on it - but the nice little box it comes in will say Porsche. Your decision if that's worth triple the price. I know I would go for the cheaper ones since they are the same.
I actually have one of the Porsche plugs and as our colleague just indicated, these are exactly the same as the cheap ones. See below the picture I just took.
If you want to replace the plugs, keep one thing in mind, what you almost never hear about in the DIY reports:
These spark plugs are super sensitive. When you install them, make sure that the tip is not touching any metal or anything else. I heard it about this for the first time from one of the forum members here and it was confirmed by one of the service advisors at my local dealership.
Thanks all! That's exactly what I was looking for. Hopefully this post helps someone else down the road.
I also appreciate the tips about the sensitivity - I plan to have a mechanic install them, while showing me how. I'd like to learn the routine maintenance on my 981 but will take an expert help for the 1st try haha.
I have heard but have no way of backing it up with data that the Porsche boxed plugs made by Bosch pass a tighter production tolerance for electrical specifications and that each one is tested instead of random sample test for the non-Porsche boxed plugs.
I have heard but have no way of backing it up with data that the Porsche boxed plugs made by Bosch pass a tighter production tolerance for electrical specifications and that each one is tested instead of random sample test for the non-Porsche boxed plugs.
You heard this from someone selling the Porsche plugs?
No, I read it somewhere on Rennlist. Search is your friend. Several threads on the topic.
I've read that too.. a couple of places.
Here was my response to an earlier thread on the same issue - LINK
So I contacted Bosch and they responded with a lot of published info. about their manufacturing and Quality Control process (mostly marketing materials).
Nowhere do they ever come close to indicating certain plugs they manufacture are of a higher quality than all the others.
In fact it was more about maintaining high standards of quality across their product spectrum.
They run checks at multiple points through the manufacturing process to guarantee every plug meets a standard threshold of high quality.
Also, I think this has been thoroughly tested by a huge collection of DIY'rs on this Forum.. those results withstanding the test of time.
Any issues would've been sussed out a long time ago with real user experiences.
I recently changed my plugs with ones bought from Pelican ($7.25) and they've worked great from the first start without a single issue.
Also just had my dealer run a PIWIS scan and they reported "No Codes / No Issues".
I would think if there was any subtle thing wrong with those OEM replacement plugs, PIWIS would've caught it.
Also you could easily bench test this yourself with a multi-meter and a pulse generator to get some hard data.
Pull a plug from a Porsche branded box ($19 from Pelican), a Bosch box ($7.25 from Pelican) and one from a Bosch box ($3.82 RockAuto).
I bet the results would be very close.
I bought the cheaper ones looked exact same as the OEM ones pulled out, just like the coil packs I used Buru looked like the Porsche ones same brand and stamping, I would change the coil packs if you remove the plugs.
In a age of automated manufacturing, it's hard to believe something as elementary as the testing of spark plugs would be done on a random basis. A production line capable of assembling and packaging a standardize product like spark plugs, would likely have a station where each and every plug is tested in all ways (short of installing them in an engine). Therefore, it's hard to believe that the added cost for the production of Porsche-branded Bosch plugs is the result of individual testing of each. I suspect that like other European car manufacturers, the sale of branded consumable parts is highly profitable.
In a age of automated manufacturing, it's hard to believe something as elementary as the testing of spark plugs would be done on a random basis. A production line capable of assembling and packaging a standardize product like spark plugs, would likely have a station where each and every plug is tested in all ways (short of installing them in an engine). Therefore, it's hard to believe that the added cost for the production of Porsche-branded Bosch plugs is the result of individual testing of each. I suspect that like other European car manufacturers, the sale of branded consumable parts is highly profitable.
No, I read it somewhere on Rennlist. Search is your friend. Several threads on the topic.
I just got a set of Bosch ones from FCP. One plug was bad out of the box. First time for everything I guess. Confirmed with moving it between cylinders and different coils.
they were on sale for $6 a plug! I assume Bosch knows they have some bad ones.
the only difference I found was ones coming out at 60k were green and the new ones were blue writing. Color must indicate if they are each tested or just batch spot tested. Not the first I heard all Porsche ones go through individual testing. Could have saved me some burned forearms!
11-07-2019, 10:08 PM
Difference between these Bosch spark plugs?
