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Do your headlights bounce?

Joined
8 March 2006
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16,594
Location
Boston
OK I did a search on this and found nothing on the fixed 02+ headlights. My headlights seem to bounce... I can see the reflection as I go over bumps there is a slight bounce... its kinda annoying. In the garage I banged on the headlamps with my fist some... I noticed the entire housing bounces a bit.

Not like its loose, just a single bounce up and down... but I see it just driving. Is this a common thing with the NSX? The car is an '05 so I think things should not be loose already... is there something wrong with my particular car?
 
All HID bounce up and down. If you have stiff suspension, it will bounce hard.
 
I can't see why the entire housing should bounce on your car when going over a bump or giving a hit with your hand. I never noticed the 02-05 headlamps do that and since it happens when you hit it with your hand I would rule out that it is the entire car bouncing from a stiff suspension. It must be annoying at night, driving with the lights on. You need someone, dealer or repair shop, to find out what's allowing that to happen. Seeing the lights shake would bug me too.
 
turbo2go you are O K on this. :smile:
Vancehu has it right "All HID bounce up and down. If you have stiff suspension, it will bounce hard." :biggrin:

Certainly your h-lite pods are not loose. It takes a bit to get used to the HID projector beams. No dispersal of headlight o/s the beam. Normal.
 
I thought I was the only one with this bouncing problem.

I never had it before on any other vehicle with HIDs and stiffer suspension.

It bothered me and still does but I don't drive the car very often at night so I guess I can live with it.
 
I don't think you're observing any sort of real "bounce". What you are seeing is a difference between the illuminated and the non-illuminated areas. The reason you may not notice it on other cars is because they have a more fuzzy cut-off instead of the nice, razor sharp cut-off on the NSX headlights.
 
I went for a drive tonight (I don't remember going for drives in any of my other cars late at night), and noticed that its really not the lamp inside the asembly... the entire assembly, front nose, seems to jiggle... Its no different if I hit the headlamp assembly or the front bumper... it jiggles just the same. and it can clearly be seen when reflecting on a wall...

There is something definitely there, but I am suspecting its just normal "stock" bounce.
 
I wouldn't be surprised if something is a little bit loose in the HID housing or bulb. My drivers side light vibrates a little bit at idle, but the passenger side is perfectly still. Haven't noticed anything while driving though.
 
Like Ski_Banker, my passenger side is still while my driver's side has a vibration. I've been putting it off to get fixed until the next time I have to go in to the dealer. It's not an issue until I'm stopped behind a car or in front of a wall. It's not noticeable while driving, from the driver's seat or from other cars.

J
 
This appears to be a common issues, especially with the HID conversion for the older models.

The driver side headlight shakes when the road get rought while the passenger side is ok.
 
im ridig on teins flex coilovers and my headlights are all over the place!:smile:
i'v checked a couple of times and found nothing loose. it is rather annoying seeing a light show on the bumper of people cars at night. :smile:
 
I used dynamat all over my headlight housings on my 91 after I did my HID retrofit, and I can't even tell you how much of a difference that it made. :smile:
 
My passenger side bounces. Been that way since I got it.
 
I had the dealer check this out today. What we noticed is that the lens INSIDE the headlamp assembly bounces... almost as if it is suspended in some sort of fluid... you can whack the headlamp with your fist, and see the lens in there bounce and even see the reflection right next to it vibrate.

The foreman took a look and said he did not know for sure, but that nothing looked out of norm on the body... he said without another NSX to compare to, he could not tell. Actually suggested I ask this forum.... lol... :biggrin:

I guess this is normal. Its annoying, but normal. I am not sure why some say "all" HID's have this, because I have owned other HID cars with NO bounce.
 
TURBO2GO said:
I guess this is normal. Its annoying, but normal. I am not sure why some say "all" HID's have this, because I have owned other HID cars with NO bounce.

While I have the headlight bounce on my aftermarket HID's on my NSX, I don't think this is normal nor do I subscribe to the theory that "all HID's do this".

The HID's in my two S2K's did not do this and those cars were much rougher riding than my NSX.
The HID's in our old IS300 did not do this.
The HID's in my mom's LS430 do not do this.
The HID's on several loaner TSX and TL's that I have had do not do this.
The HID's on several loaner RX330, RX350 ES300, ES330 and ES350's do not do this.
The HID's in my best friends E46M3 and the HID's in his Cayman S do not do this.
I could go on... but you get the point.
 
If I pull up to a white wall, and have my lights on, as my car idles, I can see a slight "shake" in the beam.... does anyone else with an 02+ have this to this extent?
 
This is NOT normal. Eric or Evosomething fixed it the other day. Both of my light bounces up and down jiggle jiggle like a DDD titties while driving....it is annnnnnoying. Anywho, you have a broken white plastic washer with the size of a dime inside the beam adjuster that needs to be fix or replace if you can find it. Once you opened up this adjuster, you will find a long screw like about 3" that has a white plastic groove at the end of it. This screw should not be moving up and down...it should stay locked in with the white washer mentioned above to control the light adjustment and to HOLD your housing in place. Since the washer is already broken, it doesn't lock anymore. so you will need to create another washer to hold it in place. Eric and I fixed it by using bonsai wire to shape around the groove to hold it in place. Problem solved. :biggrin:

It pays to have a cool vendor nearby you can call upon. Eric or Evosomething did an awesome job helping me solving that problem. Thanks Eric.


TURBO2GO said:
I had the dealer check this out today. What we noticed is that the lens INSIDE the headlamp assembly bounces... almost as if it is suspended in some sort of fluid... you can whack the headlamp with your fist, and see the lens in there bounce and even see the reflection right next to it vibrate.

The foreman took a look and said he did not know for sure, but that nothing looked out of norm on the body... he said without another NSX to compare to, he could not tell. Actually suggested I ask this forum.... lol... :biggrin:

I guess this is normal. Its annoying, but normal. I am not sure why some say "all" HID's have this, because I have owned other HID cars with NO bounce.
 
Last edited:
TURBO2GO said:
If I pull up to a white wall, and have my lights on, as my car idles, I can see a slight "shake" in the beam.... does anyone else with an 02+ have this to this extent?

I have an 02+ and there is absolutely NO bounching/shaking/movement in the cutoff beam when shining on white wall.

However, when driving, I do get some "bounce". I think this is more attributed to the imperfections in the road.

If it is the sharp cutoff that is bothering you, try to raise the beams a little. This will make them project further out and the cutoff will not be as noticeable.
 
PoohBEAR said:
This is NOT normal. Eric or Evosomething fixed it the other day. Both of my light bounces up and down jiggle jiggle like a DDD titties while driving....it is annnnnnoying. Anywho, you have a broken white plastic washer with the size of a dime inside the beam adjuster that needs to be fix or replace if you can find it. Once you opened up this adjuster, you will fine a long screw like about 3" that has a white plastic groove at the end of it. This screw should not be moving up and down...it should stay locked in with the white washer mentioned above to control the light adjustment and to HOLD your housing in place. Since the washer is already broken, it doesn't lock anymore. so you will need to create another washer to hold it in place. Eric and I fixed it by using bonsai wire to shape around the groove to hold it in place. Problem solved. :biggrin:

It pays to have a cool vendor nearby you can call upon. Eric or Evosomething did an awesome job helping me solving that problem. Thanks Eric.

poohbear you are talking about the 02+ headlights, right? I am going to go and look for what you are talking about based on your description... I may have to put up a pic to see what it is you are talking about. Thanks.
 
yup 02+ If you were here, I would pull out my bonsai tool kit for yah :tongue: Anywho, the light adjustment module is the black 2"x"3" black box on the upper right (passenger) or upper left (driver) of the light housing.

TURBO2GO said:
poohbear you are talking about the 02+ headlights, right? I am going to go and look for what you are talking about based on your description... I may have to put up a pic to see what it is you are talking about. Thanks.
 
DVDoughboy said:
I see my passenger side shake even at idle

This may be a production problem I am going to see if I can get this resolved.
 
She is definitely not wearing fruit of the loom :D

FeetFxr said:
With my very stiff suspension, mine always have bounced (...talking car here)

<img src=http://i27.photobucket.com/albums/c174/Misha040/Icons/thKasumi.gif>
 
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