HID Error Canceller Have you ever wondered what's inside these "magical" cancellers people sell? How can shops sell "cancellers" without actually knowing or telling the end user what it is? We went out and purchased a pair of every singledifferent ones and tested them against the most common scenarios. This ensures that we can tell you exactly what's inside and that it will work for you. If you would like to craft your own based on the components listed, feel free! Information empowers everyone, and what we found out was pretty intriguing. So What Did We Find? Some cancellers only had a small unmarked resistor All capacitors were 4700uF but varied widely in the vmax Many use plastic housings instead of heat dissipating metal NO ONE could tell us definitively what was inside their "canceller" NO ONE has actually done an investigation to this scale! If the canceller is very small, then it likely doesn't contain what you need General Use Information: NOTE: Please contact us for specific use cases at our Support Portal Will not work with relay wiring harness or in bi-xenon applications For use to stabilize Daytime Running Light voltage, alleviating flickering Keep DRL at full voltage, allowing the HIDs to function normally Required for some one-off applications such as the 2006 BMW E92/E90 Eliminate bulb out warning for select problem vehicles (HIDC-C4) Error Canceller Contents: 2 x canceller units (one for each side) Full metal casing (very important for proper heat dissipation!) 2 x 5.1 ohm 20 watt resistor 1 x 16v 4700uF capacitor 3.0in x 2.5in x 1.5in size. This is LARGER than most!