Mate, the link to the Hella ballast is all great and fine if we were driving an Audi or Beemer that came with stock HIDs, as that is designed to replace the OEM part and could not easily be adapted to any other car.
Fair point, but I would imagine that were Hella or Osram aftermarket kits available (chosen because there is a greater chance of them being decent quality), they would be much more expensive than the chinese ones. Not necessarily better, just more expensive.
If you look at HIDs4You's H7 HID Kits and then go to ebay and search H7 HID kits, its all the same gear, just with different stickers on and a higher price tag:
Look at the shape of the ballast not the colour or the writing....
Given that we're throwing IT analogies into the mix, just because two PCs share the same case design does not mean that the internal components are identical, nor that they will provide the same performance!
If you consider that the cost of manufacturing multiple designs outweighs sharing designs and core parts as part of a broader package (standard mass market manufacturing approach), then you can see its the same parts, badged differently.
I'm not sure I understand how you can infer that mass market manufacturing implies a single global component manufacturer for all products on the market?
HID or don't HID, its a personal choice, but exercises common sense in these times of economic strain and save those pennies for the inevitable ongoing maintenance we all have to endure to own our bellas.
I agree. However let's say you're right and there is a single component manufacturer with a percentage of faulty components. One of three things could happen:
1) You have a good one and nothing goes wrong - the majority
2) You have a bad one and it causes obvious issues - minority but you notice it and remove it before it causes any significant damage
3) You have bad one and it is affecting your vehicle electrics in a way that is not immediately obvious, e.g. EMI, inrush current, etc.
On a simple car, I would risk it. How much stuff can go wrong as a result of the potential issues? However there are so many electronic components on the 159 that you could be in for a world of trouble with blown ECUs and not even know it yet. Therefore my personal opinion is that it isn't worth the risk. You may assess the risk differently.
I'm not suggesting for a moment that you shouldn't fit HIDs to a 159, or that you shouldn't buy the cheap ones of eBay. I'm just noting that there is a potential risk and that you need to assess that risk personally before fitting the kits.