P21/4W (566) Super Canbus LED Brake & Tail Light Bulbs 1800LM White Fan Cooled

P21/4W (566) Super Canbus LED Brake & Tail Light Bulbs 1800LM White Fan Cooled

Upgrade your vehicle's original P21/4W (566) brake and tail light bulbs with these premium Super Canbus LED replacements. Designed as a direct Plug & Play upgrade, these bulbs deliver a crisp modern 5700K Cool White light with up to 1800 lumens of brightness whilst consuming significantly less power than standard halogen bulbs.

Each bulb features high-output automotive-grade LED chips, an intelligent Super Canbus driver and an integrated high-speed cooling fan to provide reliable long-term performance, excellent heat dissipation and improved compatibility with modern vehicle electrical systems.

Key Features

• Super Canbus P21/4W (566) LED Bulbs
• Direct replacement for original dual filament bulbs
• Up to 1800 Lumens high output
• 5700K Cool White light
• 18W High Beam / 2.5W Low Beam
• High & Low brightness for brake and tail light operation
• Automotive-grade LED chips
• Built-in intelligent Super Canbus driver
• Active high-speed cooling fan
• Aviation-grade aluminium body
• 360° light distribution
• Plug & Play installation
• Non-polarity design
• Over 40,000 hour lifespan
• Energy efficient operation
• Instant illumination
• Supplied as a pair

Why Upgrade to LED?

Compared with conventional halogen bulbs, these premium LED replacements produce a brighter, cleaner and more modern light output whilst generating less heat and consuming less power. The result is improved rear visibility, faster illumination and a stylish OEM+ appearance.

Intelligent Super Canbus Technology

Each bulb incorporates an intelligent Super Canbus driver designed to minimise dashboard bulb warning messages, flickering and electrical interference on many modern vehicles. Whilst compatible with most Canbus systems, some vehicles with extremely sensitive bulb monitoring may still require additional load resistors.

Advanced Active Cooling

A built-in high-speed turbine cooling fan continuously removes heat away from the LED chips, maintaining maximum light output and extending component life. Combined with the CNC-machined aviation-grade aluminium housing, the bulbs remain cooler during prolonged operation.

360° LED Light Distribution

The multi-sided LED chip arrangement closely replicates the position of the original filament bulb, producing a wide and even light pattern for improved visibility whilst maintaining excellent rear light distribution.

Ideal Applications

• Brake Lights
• Tail Lights
• Rear Position Lights
• Daytime Running Lights (vehicle dependent)
• Any application requiring a P21/4W (566) BAZ15D bulb

Technical Specifications

Package Contents

• 2 × Super Canbus P21/4W (566) LED Bulbs
• Retail Presentation Box

Important Information

• Please check your existing bulb type before ordering.
• Designed for vehicles requiring P21/4W (566) BAZ15D offset pin bulbs.
• Canbus compatible with most vehicles.
• Some vehicles with highly sensitive bulb monitoring systems may still require additional resistors.
• Suitable for 12V vehicle electrical systems.

Why Buy from HIDS-DIRECT?

HIDS-DIRECT specialises in premium automotive lighting products, supplying high-quality LED upgrades trusted by thousands of customers across the UK. Every product is carefully selected for performance, reliability and ease of installation, helping you upgrade your vehicle with confidence.

Frequently Asked Questions

Will these P21/4W LED bulbs fit my vehicle?

These bulbs are designed for vehicles that use a P21/4W (566) bulb with a BAZ15D offset-pin base. Please remove and check your existing bulb, consult your vehicle handbook or compare the base before ordering.

Do these bulbs provide both brake and tail light functions?

Yes. P21/4W is a dual-intensity bulb type, so these LED bulbs are designed to provide a lower output for the tail light function and a brighter output for the brake light function.

Are these bulbs Canbus compatible?

Yes. They include built-in Super Canbus electronics designed to reduce dashboard bulb warnings, flickering and shut-off issues on many modern vehicles. Some vehicles with especially sensitive bulb-monitoring systems may still require an additional resistor or decoder.

What colour light do these bulbs produce?

These bulbs produce a crisp 5700K cool white light. Please ensure white light is suitable for the intended lamp function and permitted for your vehicle application.

Are these bulbs polarity sensitive?

No. They use a non-polarity design, so they can operate regardless of the positive and negative electrical orientation within a compatible socket.

Do these bulbs have a cooling fan?

Yes. Each bulb contains a built-in high-speed turbine fan that helps remove heat from the LED chips and supports stable performance during prolonged use.

Do I need to modify the wiring?

No. These bulbs are designed as a direct Plug & Play replacement for a compatible P21/4W socket. No rewiring or coding is normally required.

How many bulbs are supplied?

This product is supplied as a pack of two LED bulbs.

Are these LED bulbs road legal?

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