CB7 W21/5W 7443 White LED DRL Bulbs – CANBUS Fan Cooled – Twin Pack

Upgrade compatible W21/5W lamps with the CB7 white LED bulbs. Combining powerful LED chips, an integrated CANBUS system and active fan cooling, the CB7 delivers a crisp white appearance in a compact, all-in-one design.

The CB7 is a premium option for drivers looking for strong light output and enhanced compatibility with vehicle bulb-monitoring systems. Its dual-level design supports compatible applications that use a brighter daytime running light and a lower-output position light from the same W21/5W bulb.

Supplied as a twin pack containing 2 white W21/5W / 7443 CB7 LED bulbs.

Key Features

• High-output white light: manufacturer-rated output of 2,500 lumens per bulb.
• Enhanced built-in CANBUS: designed to reduce dashboard bulb warnings associated with LED replacement bulbs.
• Active fan cooling: an integrated cooling fan helps move heat away from the LED assembly.
• Aluminium construction: a 6063 aluminium body and ventilation openings help dissipate heat.
• Dual-level operation: high and low output modes for compatible W21/5W circuits.
• Multi-sided LED layout: 3570 and 3030 LED chips provide a manufacturer-specified 360° light distribution.
• Integrated driver: constant-current electronics, cooling and CANBUS circuitry in one bulb.
• Direct-fit wedge connection: fits compatible standard 7443 / W21/5W holders, subject to available clearance.

Suitable Applications

For compatible daytime running light (DRL) and position/sidelight applications where the original bulb is specified as W21/5W / 7443 and white light is required. Check the existing bulb, socket wiring and lamp clearance before ordering.

Supplied as 2 white CB7 W21/5W / 7443 LED bulbs for compatible standard 7443 sockets.

Technical Specification

Fitment & Installation

• Match the original bulb type and contact arrangement before purchasing. A similar-looking wedge base does not confirm electrical compatibility.
• Standard 7443 and CK-wired sockets have different contact arrangements. This version is for compatible standard 7443 wiring.
• Check clearance inside the lamp housing and leave the cooling openings unobstructed.
• If the bulb does not illuminate, switch off the power, remove the bulb and rotate it 180° before refitting.
• Test both output modes after installation.

CANBUS compatibility: the CB7 has an enhanced built-in CANBUS system, but bulb-monitoring behaviour varies between vehicles. Error-free operation cannot be guaranteed on every vehicle; some applications may require additional measures.

Performance figures are supplied by the manufacturer and have not been independently verified by HIDS-DIRECT. W21/5W identifies the original bulb category, rather than the electrical consumption of this LED replacement.

Frequently asked questions