Review on 🔆 iJDMTOY Canbus LED Replacement Bulbs - Xenon White 54-SMD 7507 PY21W - Compatible With BMW 1 2 3 4 Series X1 X3 X4 X5 - Front Turn Signal or Rear Backup Lights by Will Murphy

Disclaimer: For anyone complaining of flickering on startup, hyper flash or sometimes while driving, know this is exactly what should be happening. The ECU in your vehicle is coded to expect a halogen bulb and monitor for bulb failure. It does this by sending small pulses through the circuit to detect a short. It does this when starting and while driving. This will light up the "Lightbulb not working" warning. In order for your installation to be considered truly complete, you must code your controller to wait for an LED bulb and disable cold and warm bulb monitoring. If you own a BMW, install the Bimmercode app, buy one of the supported OBDII adapters using the EXTREMELY EASY-TO-USE app. It takes around 10 minutes from start to finish and you will be 100% satisfied with the result. The bulbs themselves are exactly as described and are an order of magnitude brighter and faster than the P21W halogen bulbs they replaced. In a headlight reflector housing, the F30 is a great marker and indicator. Regarding durability/quality, I will update this review over time. Any crashes I encounter are described here. If you need powerful and fast LED lighting at a fraction of the cost of some alternatives, I'd say buy this and go for it.