Helllo. Just picked up my 99Audi A4 1.8T Quattro the other day and it needs new tailight bulbs. went to autozone, picked up new ones, switched em out and they were the wrong bulb becuase it was making my third brake light stay on. and seeing I threw away the old bulbs I have no way of knowing wat size bulbs i need.Soooo if you could tell me the bulb size, thatd be awesome! Thanks

 

doesn't your owner's manual tell you this kind of stuff?

 

http://www.sylvania.com/ConsumerProd...lacementGuide/

 

1999 AUDI A4 (With replaceable halogen capsules)
Low beam headlamp
H7
H7ST Silverstar High Performance Lighting: The Whiter and Brighter Halogen
H7XV XtraVision Halogen Upgrade: Up to 20% Brighter
H7CB Cool Blue Halogen Upgrade: White Hot; Super Cool; 100% Street Legal
H7LL Long Life Halogen: Lasts two and a half times longer

High beam headlamp
H7
H7ST Silverstar High Performance Lighting: The Whiter and Brighter Halogen
H7XV XtraVision Halogen Upgrade: Up to 20% Brighter
H7CB Cool Blue Halogen Upgrade: White Hot; Super Cool; 100% Street Legal
H7LL Long Life Halogen: Lasts two and a half times longer

Parking light
2357A

Front turn signal
2357A
2827

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

Tail light
7528

Stop light
7528

High mount stop light
2825

Fog/Driving light
H7
H7ST Silverstar High Performance Lighting: The Whiter and Brighter Halogen
H7XV XtraVision Halogen Upgrade: Up to 20% Brighter
H7CB Cool Blue Halogen Upgrade: White Hot; Super Cool; 100% Street Legal
H7LL Long Life Halogen: Lasts two and a half times longer

License plate
6418

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

Front sidemarker
2357A

Rear sidemarker
2825

Glove box
6418

Map light
2825

Dome light
6411

Step/Courtesy light
6418

Trunk/Cargo area
6418

Under hood light
6411
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