I've been getting CD Error 4 on my 9006 for ages and it's really been getting me down as I don't really like the radio and love playing my CD's. Anyway, I've tried the above, and after about 1.5 years of CD Error 4, plus my CD seemingly unable to play some Infiniti Lightscribe disks, since Saturday (now 2 days) when I tried the above, all is well and even the Lightscribe disks are finally playing. I have been writing to audio repair companies and have sent the CD player off before at a cost of £70 to have the issue fixed, and it last about 6 months before the error came back again. They said normally it just needs a clean, so I suspect I paid £70 for the above.... now with the right tools, I can do it myself! Will let you know in a week or so if I'm still having an issue or not, but it's looking good so far and as yet, not one cd error 4 has been seen.
Thanks for the above!
Richard, July 2009