Hi has anyone fitted Bosch spark plugs to the TSI? Main reason is being the rust/corrosion on the threads. I've noticed over the years that Bosch have a much higher level of corrosion resistance than the NGK.

I replaced the 4 on my 1.2 TSI Yeti last year with Bosch Y5KPP332. Not had any issues or anything different.

I believe NGK have the threads coated now, well the ones I've looked at.  Generally anything electronic or electrical I favour Japanese over German (not that I know who actually make Bosch's plugs and where), there have been warning about fake NGK plugs being sold.  I tried Bosch plugs in the past and soon went back to  NGK.

 

They NGK will have some coating on but they are rusty as hell when you take them out, just thought I might try Bosch to see if it stops the massive corrosion as it could be the reason the engines feel better when new plugs installed.

Fair enough. It might be part of the reason but generally plugs are often left in well passed their optimum, or best anyway, many think if they're working that's all that's required, similarly if the car has a current (or even new) MoT then it must be OK or good and we know that's often not correct.

 

I must admit I've dodged the PITA removal of airbox, coils and plugs as my wife said it wasn't worth investing in the extra tools, grease and buying the plugs as she won't have the car for the next change, she's learnt by her mistake of getting it, it was her choice and I can't persuade her not to change it so as to get the value out of buying it and replacing all the bits that needed replacing (that shouldn't have).  I'm not a mechanic and I don't enjoy farting about with cars, particularly our own car(s).

 

 

  

If anyone is interested you can get 4 Bosch spark plugs for £36.71 on eBay.