Auxbeam B21-PRO 3157 US-CK white/amber LEDs — 2 bulbs and 2 C8 decoders

Description

Auxbeam B21-PRO 3157 US-CK White/Amber Switchback LEDs – 2 Bulbs

This is the 2-bulb 3157 US-CK switchback package, with the selected C8 decoder/resistor option. It is intended for vehicles where a single original bulb performs both the parking/daytime-running-light and turn-signal functions.

Lighting Functions

• White light for parking lamps or daytime running lights where the original circuit supports that function.
• Amber flashing light for turn-signal use.
• Dual-colour switchback operation requires compatible combined-function wiring.

Selected Configuration and Manufacturer Information

• Selected quantity: 2 × Auxbeam B21-PRO 3157 US-CK white/amber LED bulbs.
• This exact GP00013933 variant includes 2 C8 decoder/resistor adapters for 3157 US-CK, selected separately from the 2-bulb package. The manufacturer option explicitly states 2 pieces and its selected image shows the two adapters.
• Auxbeam lists 3030 LED chips, fan cooling, 6500 K white and 3000 K amber for this series.
• Manufacturer-rated light output: 4,000 lm per pair for the base switchback product; not a verified installed output.

Electrical specification and supply

Auxbeam specifies 5 W white / 25 W amber per bulb, 32 chips per bulb (8 white and 24 amber), and a 12–24 V electrical range while stating use in 12 V cars. This listing is for compatible 12 V applications; 24 V vehicle suitability is not confirmed.

Ordered from the supplier; not held in our own stock. Auxbeam listed this exact variant as available on 7 November 2026. Availability and dispatch timing may change. Contact us for the current delivery estimate before ordering; no guaranteed delivery date is stated.

Compatibility and Approval

Check the vehicle’s original bulb type and 3157 US-CK socket pin arrangement before ordering. Standard and CK pinouts may differ, so similar-looking bulb bases are not a guarantee of compatibility. The selected C8 option does not guarantee freedom from hyperflash or dashboard errors. European E-mark approval and public-road suitability have not been verified.