EM TuningChris Nott
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  1. #1
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    Question When did sidelight bulbs change from bayonet style to 501's?

    Hi all,

    Could anyone confirm when the B5 A4 changes from bayonet style sidelights to 501's? Was it with the facelift headlights? Mine is pre-facelift and has bayonets.

    Wondering if it's possible to change to 501's without changing headlamps?

    Cheers

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  3. #2
    S4_dan's Avatar
    Fire up the Quattro!

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    Must be facelift headlights as my pfl car has fl headlights in with 501s.

    Does the bayonet holder just push into the headlight? If so, cut some 501 holders off from a scrapyard and connect up and fit.
    2002 2.5 V6 Quattro
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  4. #3
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    Yeah it just pushes in to a rubber grommet. I don't know if the size is comparable. I'll have a look, I have both types of bulb.

    Thanks Dan.

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    Bradderz_1988's Avatar
    Dont replace it, Upgrade it !!

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    Mines facelift and has 501's
    1999 Audi A4 1.8T Quattro Sport - Volcano Black

    Mods - Frankenturbo F21 Kit - 3" MAF - Saab Reds - THS Decat - Non Res Milltek - ECS Crank Pulley - 034 Snub + Bracket/Gbox Mounts - 1Z/S2 Clutch + Flywheel - 007p - ICM + EVAP Delete - PFR6Q Plugs - S4 B6 345mm Brakes - 300mm Rear Brakes - Goodridge Hoses - LCR Splitter -S4 Bumbers + Skirts/Mouldings - OEM Xenons - Apikol Diff mounts - Polytek'd Rear Diff Mount
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    "Stick a V8 in it!"

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    I always thaught they were all 501 with the exception of Facelift S4's.

    Facelift S4's got H6W bayonets in an attempt to make the sidelights look less yellow against the HID dip beam!

    Looking at ETKA, prefacelift cars WITHOUT front fogs got T4W bayonet bulbs. The pre-facelifts WITH front fogs got a 501 wedge.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
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  7. #6
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    Quote Originally Posted by aragorn View Post
    I always thaught they were all 501 with the exception of Facelift S4's.

    Facelift S4's got H6W bayonets in an attempt to make the sidelights look less yellow against the HID dip beam!

    Looking at ETKA, prefacelift cars WITHOUT front fogs got T4W bayonet bulbs. The pre-facelifts WITH front fogs got a 501 wedge.
    I can confirm that my pre-facelift A4 has bayonets and no foglights, so that aligns.

 

 

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