Auxbeam B21-PRO standard 3157 LEDs — 4 bulbs and 4 C8 US-model decoders

Description

Auxbeam B21-PRO 3157 White/Amber Switchback LEDs – 4 Bulbs

This is the 4-bulb T25/3157 dual-colour switchback option, with the selectable C8 decoder/resistor accessory variant for US models. The manufacturer’s main description covers the standard 3157 bulb; the exact vehicle-specific socket and decoder compatibility must be checked separately.

Lighting Functions

• White light for parking lights or daytime running lights, where the original bulb performs that function.
• Amber flashing light for turn signals.
• The dual-colour function requires an original socket/wiring arrangement that combines parking/DRL and turn-signal functions in one bulb.

Selected Configuration

• 4 × B21-PRO T25/3157 white-and-amber switchback LED bulbs (based on the selected package quantity).
• Includes 4 C8 decoder/resistor adapters, the manufacturer’s US-model-labelled 3157 option, in addition to the 4 bulbs. Exact GP00013062 variant and checkout explicitly identify both quantities. This is distinct from EU-labelled and CK variants. The manufacturer’s selected four-bulb image does not show the included C8 adapters.
• Manufacturer lists 3030 LED chips, fan cooling, white 6500 K and amber 3000 K.
• Auxbeam lists 4,000 lm per pair for the base product. Actual output depends on installation and operating mode.

Electrical specification and supply

Auxbeam specifies 5 W white / 25 W amber per bulb 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.

Supplier order, not our own stock. Exact variant available at Auxbeam 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.

Important Fitment Information

Check whether the vehicle requires standard 3157 or CK-style pinout, and verify bulb quantity, resistor compatibility and wiring before ordering. The manufacturer’s general text discusses US-model 3157 sockets, even where an EU-labelled C8 option is offered. The decoder option is not a guarantee against hyperflash or dashboard errors. E-mark approval and public-road suitability in Europe have not been confirmed.