This amplifier is ruined, right?

S

Steiner

Member
Hey,

So I just removed the amplifier from my Z4. The radio hadn't been working; no audio at all.

Here it is:

RVOAVl.jpg

I apologize for the poor picture.

Pretty sure I can write this one off. Should I even bothering opening it up and taking a look there?
 
It isn't corrosion. The image is deceiving, but I'm unsure what this is called in English, but it's very similar to the material that often forms around old batteries. It crumbles everywhere and there was some residue in the trunk compartment for the amplifier. I didn't have time to check it out properly, but I'll be sure to get better photographs tomorrow.
 
I imagine it's the capacitors in the amp that have been cooked. Never seen anything like that before! Is the firewall and surrounding area all ok?


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If you're referring to sulphite crystals then that is corrosion.

You've likely got a damp issue where the amp Is sited and it's caused a short hence corrosion and then amp Failure.

I'd suggest checking where the corrosion might be starting (damp getting in) then replacing the amp. It is most likely not repairable.
 
^+1 That amp is toast, looks like some components have erupted there..!.. not worth opening up and repairing, get a replacement from a breakers or fleabay
 
I'll be sure to take a close look at the compartment! I didn't notice any dampness or excessive humidity in the boot, but in all honesty, I think a day or two inside a ventilated and heated garage would do the car nothing but good.

Back to amps though! Would the amp 65129118611 fit this car (2003 Z4 2.5i) which according to BMW has the following sound system: 0676 HiFi loudspeaker system? The amplifier I just pulled out has the part no. 65106929689. The amp I'm asking about is from a later model Z4 Coupe 3.0si/M.
 
off topic / on topic... would you have to replace a bmw amp with an exact same amp? or could you 'uprate' it with a cheaper (and possibly, paradoxically, better) amp?
 
That is a mid level amp, "Hi-Fi", not "Top Hi-Fi" and thus not DSP. The current replacement part no. is 65129143127, it's not really all that expensive. The 8611 is also mid level, but years apart. I can't say it'll work, may be worth a try if you can get a full refund.

An amp upgrade is enticing but not without issues. There are 10 speakers to drive, so you would likely need to abandon a pair or two. The OEM speakers have odd impedances that need to be considered. The amp has odd cross over frequencies, not sure the OEM speakers can properly handle a more conventional set up, they probably can. The good news is you don't have to deal with the digital feed from the head unit as you do with DSP.
 
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