[SOLVED] Xenon dipped beam failure on both sides but not simultaneously

simkard · Oct 29, 2021

Hello dear 7ers,

My E65 has dipped beam lights failure.
Lights died one at a time, and then the other a few weeks later.

At first I thought it was coming from multiple sources :

Bulbs (part #3)
Igniter (part #2)
Control module (part #1)

Changed those parts with new ones

Bulbs : Osram 66240XNL-HCB Xenarc
Igniters : AliExpress new ones
Control modules : AliExpress new ones

Fact is that it worked for some days and then died again at the same time.
Now when I turn on the lights, both power on but in a few seconds :

Left one dies and doesn't light up later (chime and error appear on dash)
Right one works but from time to time it power down a few seconds (chime and error appear on dash) and lights up again

Do you have any advice as I never replaced the "Electronic Box ALC" (part #5).
Maybe finally, the guilty one is this module ?
Or maybe the AliExpress parts are definitely 5h17y ones ?

Thanks for your help

simkard · Dec 9, 2021

Hello All,

Refreshing this thread as I still did not found the problem

simkard · Jul 22, 2022

Updating this thread for the sake of everyone's searches and wondering why does these chinese Xenon ballast are basically 5hi77y products.

I was facing the "should I buy a cheap ballast from aliexpress ... OR should I buy brand new genuine Hella xenon ballast" ... and as a lot of us I tried the xenon ballasts from aliexpress.
Basic statistics from my own perspective : 1 of 10th ballast from aliexpress are just quite dead-borns and will died very very soon + the fact that they are not generating the proper signal to light up the bulbs perfectly.

So finally, at the end of the day, I was still trying to find a solution and went the "let's try and buy used genuine parts and see if it works fine" ... aaaaaaaand VOILA !
Bought 2 Xenon ballasts from a Renault Espace 4 for 45€ (shipping included), replaced the problematic one on the car and TAAAADAAA, no more probmems, everything working fine since then.
No more flickering, no more shut down for X seconds and light up again, no more "dipped beam failure" warning/error on dash, and perfect lighting of the xenon bulb.

I hope this helps some people facing the same problem.
Sometimes aliexpress products are fine (like the xenon igniters that are attached to the bulb), but for the ballasts, this is another level.

Cheers !

[SOLVED] Xenon dipped beam failure on both sides but not simultaneously

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