I know that Mercedes does not allow LED festoon bulbs (for license plate lights). It will flash and shut it off. You need a resistor for it to work.

BMW and Lexus work with after market LED wedge and feston bulbs.

Does Audi have a problem with after market LED lights?

 

Yea, but its really not a big deal. If you don't put in a resistor it will tell you that the bulb is out.

 

But it will still light up, not like Mercedes where it shuts it off?

 

Yup it'll definately light up. Just don't expect a huge improvement - I swapped out both my rear brake lights for LEDs soon as a I bought my a4 and n retrospect i would simply have save the $16 and gone with conventional lights. I think you need the whole big LED cluster light thing going for a big difference.

 

Yea, its not a huge difference, unless you're swapping out white bulbs (like your tag lights)

 

Nope, I meant the wedge bulbs for the license plate lights and the interior lights. does anyone know exactly what size these bulbs are?

 

Certain bulbs are available for sale at the SYLVANIA Online Store. New bulbs will be online for purchase in the coming weeks.

2002 AUDI A4 (With halogen capsule headlamps)

Low beam headlamp
H7
H7SU Silverstar ULTRA for Ultra Night Vision - The Whitest and Brightest Halogen
H7ST Silverstar High Performance Lighting: The Whiter and Brighter Halogen
H7XV XtraVision Halogen - The Brighter Light
H7CB Cool Blue Halogen - The Whiter Light

High beam headlamp
H7
H7SU Silverstar ULTRA for Ultra Night Vision - The Whitest and Brightest Halogen
H7ST Silverstar High Performance Lighting: The Whiter and Brighter Halogen
H7XV XtraVision Halogen - The Brighter Light
H7CB Cool Blue Halogen - The Whiter Light

Parking light
3457ALL
3457AST Silverstar Signal Lighting: Complete the Look: Crisp, Clean, Style

Front turn signal
2827
3457ALL
3457AST Silverstar Signal Lighting: Complete the Look: Crisp, Clean, Style

Rear turn signal
7506
7506LL Long Life Upgrade: Up to twice the life of the standard lamp

Tail light
7528
7528LL Long Life Upgrade: Up to twice the life of the standard lamp

Stop light
7528
7528LL Long Life Upgrade: Up to twice the life of the standard lamp

High mount stop light
Assembly

Fog/Driving light
H11
H11XV XtraVision Halogen - The Brighter Light

License plate
6418
6418LL Long Life Upgrade: Up to twice the life of the standard lamp

Back up light
7506
7506LL Long Life Upgrade: Up to twice the life of the standard lamp

Front sidemarker
3457ALL
3457AST Silverstar Signal Lighting: Complete the Look: Crisp, Clean, Style

Rear sidemarker
7528
7528LL Long Life Upgrade: Up to twice the life of the standard lamp

Glove box
2825
2825LL Long Life Upgrade: Up to twice the life of the standard lamp

Map light
64111

Dome light
6411

Step/Courtesy light
2825
2825LL Long Life Upgrade: Up to twice the life of the standard lamp

Trunk/Cargo area
6418
6418LL Long Life Upgrade: Up to twice the life of the standard lamp

Under hood light
6411

Daytime running light
2825
2825LL Long Life Upgrade: Up to twice the life of the standard lamp

 

Myst420, thansk a lot. The site I was referring to is www.superbrightleds.com
They only sell 168/194 bulbs and festoon bulbs (the cylindrical kind) so I would need to know size (42 inch, 44 inch, 48 inch, etc)

 

IN the spirit of this thread, I've ordered some LED park lights from ebay for $8 thinking I might as well give them a shot... any experience anyone?

 

i have led license bulbs and reverse lights. my plate lights work fine i order them from autoillumination for like 12 bucks or something there are 9led ones half way down the bottom of the page. no problems with flickering or not working or error codes. jus make sure they are over 12v on the led. pics!