2002 Jetta Stereo Head Unit Replacement

I have a 2002 Jetta. When I bought it, the salesman told me that if the head unit was replaced with an aftermarket unit it would cause problems with the electrical system and they wouldn't be able to hook it up to their computers for diagnostics any more.

Is there any truth to this, or was he just lying to get me to buy the Volkswagen CD player?

Also, if I replace the factory component speakers with better after market speakers, would it be worthwhile if I don't also replace the head unit? Or would it only make a very minor improvement?

Thanks for your replies,

Symbiosis

I have a 2002 Jetta. When I bought it, the salesman told me that if the head unit was replaced with an aftermarket unit it would cause problems with the electrical system and they wouldn't be able to hook it up to their computers for diagnostics any more.

Also, if I replace the factory component speakers with better after market speakers, would it be worthwhile if I don't also replace the head unit? Or would it only make a very minor improvement?



True it will cause problems with alarm and depending on how installed and what brand it will not allow communications w. scan tools.
Factory speakers are good, if its a monsoon.

True it will cause problems with alarm and depending on how installed and what brand it will not allow communications w. scan tools.
Factory speakers are good, if its a monsoon.

Nope, its not a monsoon.

Would upgrading the speakers without a new head unit be worthwhile? Or does VW at least offer any head units with a input jack for a MP3 player?

nope, but you can get the monsoon radio from vw, it has higher watt for speaker rating...

I have a 2002 Jetta. When I bought it, the salesman told me that if the head unit was replaced with an aftermarket unit it would cause problems with the electrical system and they wouldn't be able to hook it up to their computers for diagnostics any more.

Is there any truth to this, or was he just lying to get me to buy the Volkswagen CD player?

Also, if I replace the factory component speakers with better after market speakers, would it be worthwhile if I don't also replace the head unit? Or would it only make a very minor improvement?

Thanks for your replies,

Symbiosis

That is just dealer mumbo jumbo. I put a Pioneer in mine and PPI speakers. It has worked fine for the last year. The speakers are a bitch if you have factory Monsoon though!!!!!!!