Bi-Xenon Adapterkabel [ 3er BMW - E46 Forum ]

How to: factory wire bi-xenon solenoid - SKBOWE PWM filter

FYI: 01 M3 Single Xenon to Bi-Xenon Retrofit - NA M3 Forums

Wiring for halogen to Bi-xenon conversion

E30 Lighting Guide + DIY Bi-Xenon Conversion - R3VLimited Forums

DIY: Full Factory Bi-Xenon Retrofit

How To: 9005 to 2-wire Bi-Xenon Solenoids - SKBOWE PWM filter

Replacing Bi-Xenon with Bi-Xenon

Single xenon to bi-xenon upgrade

Write-up: BMW E46 bixenon projector headlight conversion for LT1 Firebirds - LS1TECH - Camaro and Firebird Forum Discussion