99% an ignitor issue. I'd try swapping ignitor from left to right.
You can replace the ignitor individually with an OEM peice, or replace the ballast/ignitor assembly with an aftermarket one that will be PnP into your D2S housing.
hid lights hid kits
Hot: 2001 Estoril M Roadster
[/b] ZCP 19's, ZHP knob, JL 8W3
Cold: 2002 TiAg M3 6mt
ZCP 19's, ZHP knob, GROM, OEM 18's,