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MCK AUTO - PY21W Amber Orange LED Canbus Bulbs Indicator - works without errors on most cars as the current goes to 1.7A and drops after 1 second to 0.3A (good for indicators) 1000 Lumens Brightness per bulb COMPATIBLE WITH - F30 F31 F33 F34 F10 F11 F20 F21 F22 A3 A4 B8 A5 A6 also Focus and Quashqai - Does NOT work on A4 B7 (needs extra load resistors) TRANSFORM YOUR RIDE - With these ultra bright LED bulbs - get that modern look with instant ON/OFF. Simple replacement - pull out old bulb and put ours in, 5 minute job. No extra tools required only the access to bulb (depends on a car) COMPATIBILITY NOTE - Please Don't buy if your car is not listed here as CanBus current is different on cars and some will still show error. In this case you would have to add extra load resistors. Although we really try to have an accurate list of cars we are not always right so please let us know if you have any issues.