Put in BOSH +4 plugs last night

[gsotis]

Hey guys, last night I put in some bosh +4 platnium plugs in my 530, and the engine diffently smothier and sounds better then before, but i did not really notice any other diffrences manily in power , this may be becuase my O2 sensors need to be replaced. Not to sure yet if there is any better gas millage, but I havent driven my car to much since i put them in, so ill update you guys later.


Greg.

[Lennyz525i]

Ouch.. You might wanna do a quick search about bosch plats (+2 +4) etc.

[632 Regal]

yep, time to get some plain old stock bosh before you start having mysterious problems.

[gsotis]

really? What kind of problems have people had with them? I heard they were good for BMW V8 engines

[632 Regal]

by who? the salesman at the parts counter?

seriously there have been more than a few problems documented on this board with any aftermarket performance plugs. from slight miss to total missfire to other obscure issues and engine codes being thrown.

really? What kind of problems have people had with them? I heard they were good for BMW V8 engines

[gsotis]

I read it on some guys 530i web site, who put them in his car

[Mendozart]

The PO had installed them in my car. I had no problems with them. I didn't notice till it was time for me to replace them. I didn't put them in again though.

[Torque]

Are just regular Bosch Platinum (non +anything) bad as well ?

[Cambridge]

For my tune up I ordered a set and they seemed to work fine for a week or so, but then I started having power loss problems with fault codes getting set. I returned the plugs for a refund and bought the stock plugs instead. My problems went away.

I had high expectations for the +4 because they were platinum, had four grounds instead of two, and they cost a lot more. Unfortunately, I found in my case that the much cheaper stock plugs did a better job for less money.

I'm told that much of the problem revolves around the very tiny platinum electrode.

I hope you have better success than I did. Let us know how it goes.

[Lennyz525i]

Are just regular Bosch Platinum (non +anything) bad as well ?

The M20 engine doesn't like them. I installed a set of bosch plats just after I got my 525i, they looked really bad after 6K miles.