W21/5W (7443) Super Canbus LED Brake & Tail Light Bulbs 1800LM White Fan Cooled

W21/5W (7443) Super Canbus LED Brake & Tail Light Bulbs 1800LM White Fan Cooled

Upgrade your vehicle's original W21/5W (7443) filament bulbs with these premium Super Canbus LED replacements. Producing up to 1800 lumens of crisp 5700K Cool White light on high output whilst retaining a lower tail light output, these dual-intensity LED bulbs provide a modern appearance, improved visibility and reliable performance.

Designed as a direct replacement for compatible W21/5W (7443) bulbs, each LED incorporates automotive-grade LED chips, intelligent Super Canbus electronics and an integrated high-speed cooling fan for maximum performance and long service life.

Key Features

• Super Canbus W21/5W (7443) LED Bulbs
• Dual-intensity Brake & Tail Light operation
• Up to 1800 Lumens high output
• 5700K Cool White LED colour
• 18W power output
• Automotive-grade LED chips
• Intelligent Super Canbus driver
• Designed to reduce bulb warnings and flickering
• Built-in high-speed cooling fan
• Aviation-grade aluminium construction
• 360° LED light distribution
• Plug & Play installation
• Non-polarity design
• Over 40,000-hour lifespan
• Supplied as a pair

Designed for Dual-Intensity Lighting

The W21/5W (7443) is a dual-intensity wedge bulb that performs two separate lighting functions using a single bulb.

When used as a tail light, the bulb operates at a lower brightness. When the brake pedal is applied, it automatically switches to full output, producing a much brighter light.

This dual-function design makes the W21/5W one of the most common bulbs used for combined brake and tail light applications on modern vehicles.

Powerful 1800LM White LED Output

The high-output brake function delivers up to 1800 lumens of crisp 5700K cool white light, while the lower output provides a clearly visible tail light.

The LED chips produce a clean white colour that gives a modern OEM+ appearance whilst significantly improving visibility compared with conventional filament bulbs.

Instant Brake Light Response

LED technology reaches full brightness almost instantly. When used as a brake light, this provides a faster response than traditional filament bulbs, helping following drivers recognise braking sooner.

Intelligent Super Canbus Technology

Each bulb incorporates an intelligent Super Canbus driver designed to minimise dashboard bulb warnings, flickering and shut-off issues on many modern vehicles.

Whilst compatible with most Canbus systems, some vehicles with particularly sensitive bulb monitoring may still require an additional resistor or Canbus decoder.

Advanced Active Cooling

A built-in high-speed turbine fan continuously removes heat from the LED chips while the aviation-grade aluminium housing rapidly dissipates heat to maintain maximum brightness and long-term reliability.

360° LED Light Distribution

The multi-sided LED arrangement closely replicates the position of the original filament, helping produce an even light pattern and excellent visibility from all viewing angles.

Ideal Applications

• Brake Lights
• Tail Lights
• Rear Combination Lamps
• Stop Lights
• Selected DRL applications
• Any compatible application requiring a W21/5W (7443) bulb
• Any compatible application requiring a W3x16q wedge base

Technical Specifications

W21/5W (7443) Compatibility

W21/5W and 7443 are commonly used references for the same dual-intensity automotive wedge bulb.

These bulbs use a W3x16q wedge base with dual electrical circuits for separate tail and brake light operation.

Do not confuse them with the single-intensity W21W (7440), which performs only one lighting function. Although they appear similar externally, they are designed for different applications and are not always interchangeable.

Package Contents

• 2 × Super Canbus W21/5W (7443) LED Bulbs
• Retail Presentation Box

Important Information

• Please check your existing bulb before ordering.
• Designed for W21/5W (7443) W3x16q wedge applications.
• Dual-intensity brake & tail light operation.
• Not suitable for W21W (7440) single-intensity applications where the electrical circuits differ.
• Canbus compatible with most vehicles.
• Some vehicles may still require additional resistors or decoders.
• Suitable for 12V vehicle electrical systems.
• Please ensure sufficient clearance for the fan-cooled body.
• Road-use legality depends on vehicle and application.

Why Buy from HIDS-DIRECT?

HIDS-DIRECT specialises in premium automotive lighting products trusted by thousands of UK motorists.

Every product is carefully selected for performance, reliability and ease of installation.

Frequently Asked Questions

Will these W21/5W LED bulbs fit my vehicle?

These bulbs are designed for vehicles that use a W21/5W (7443) bulb with a W3x16q wedge base. Please remove and inspect your existing bulb, consult your vehicle handbook or compare the bulb base before ordering.

Are W21/5W and 7443 the same bulb?

Yes. W21/5W and 7443 are commonly used references for the same dual-intensity wedge-base automotive bulb. Both use a W3x16q wedge fitting with separate brake and tail light circuits.

What is the difference between W21/5W and W21W?

W21/5W (7443) is a dual-intensity bulb with separate low and high brightness outputs for tail and brake lights. W21W (7440) is a single-intensity bulb with only one brightness level. Although they look similar, they are designed for different lighting functions.

Can these bulbs be used as brake and tail lights?

Yes. These bulbs are specifically designed for compatible dual-function brake and tail light applications where a W21/5W (7443) bulb is fitted.

What colour light do these bulbs produce?

These bulbs produce a crisp 5700K Cool White light. The tail light operates at a lower brightness, while the brake light switches to full output for increased visibility.

How bright are these LED bulbs?

The brake light function produces up to 1800 lumens of cool white light, providing excellent visibility compared with many standard filament bulbs.

Are these bulbs Canbus compatible?

Yes. They feature intelligent Super Canbus electronics designed to reduce dashboard bulb warnings, flickering and shut-off issues on many modern vehicles. Some vehicles with particularly sensitive bulb-monitoring systems may still require additional load resistors or Canbus decoders.

Are these bulbs polarity sensitive?

No. They feature a non-polarity design, allowing them to operate regardless of the positive and negative electrical orientation within a compatible socket.

Do these bulbs have a cooling fan?

Yes. Each bulb incorporates a built-in high-speed turbine cooling fan that helps dissipate heat from the LED chips, maintaining stable brightness and extending service life.

Do I need to modify the wiring?

No. These bulbs are designed as a direct Plug & Play replacement for compatible W21/5W (7443) sockets. No rewiring or coding is normally required.

How many bulbs are supplied?

This product is supplied as a pack of two W21/5W (7443) LED bulbs.

Are these LED bulbs road legal?

Road-use legality depends on the vehicle, lamp unit and intended application. LED retrofit bulbs may not be approved for every exterior lighting application, so please check the relevant vehicle-lighting regulations before installation.