Originally Posted by Leroy
Investigated my front indicator not working and found its a combination of the below corrosion and a own bulb. The top brass nut that the lens screw, screws into was not attached to the back plate. So guess its allowed water ingress and its pooled at the bottom and rusted up. Squirted so acf50 in and let it penetrate for a bit before trying the old bulb, but that's a gonna. A new bulb worked. What part do I need to order for a 2004 roadster? Preferably one that won't take my eyes out 😂
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Replacement lamp should be Lucas L691 Leroy, with pointed lens. The same number should appear on your OE lens to confirm. Click below for source.

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Note later Roadsters and certainly my 2018 3.7 used L794 at the front only. This has a deeper lens with flatter front which accomodates an integral reflector although the base is the same.

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone