PY21W Super Canbus Amber LED Indicator Bulbs 18W 1100LM BAU15S Fan Cooled

PY21W Super Canbus Amber LED Indicator Bulbs 18W 1100LM BAU15S Fan Cooled

Upgrade your vehicle's original PY21W amber indicator bulbs with these premium Super Canbus LED replacements. Producing up to 1100 lumens of intense amber light, these high-performance LED bulbs deliver faster illumination, improved visibility and a clean modern appearance.

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

Key Features

• Super Canbus PY21W Amber LED Indicator Bulbs
• Direct replacement for compatible PY21W filament bulbs
• BAU15S single-contact bayonet base
• Offset locating-pin arrangement
• Up to 1100 Lumens amber output
• 18W power output per bulb
• Strong, intense amber LED colour
• Designed for front, rear and side indicator applications
• Automotive-grade LED chips
• Built-in intelligent Super Canbus driver
• Designed to reduce rapid flashing and bulb warnings
• Integrated high-speed cooling fan
• Aviation-grade aluminium construction
• 360° light distribution
• Plug & Play installation
• Non-polarity design
• Instant illumination
• Over 40,000-hour lifespan
• Supplied as a pair

Designed for Amber Indicator Applications

The PY21W is a single-intensity amber signalling bulb commonly used for vehicle indicator and turn-signal applications.

Unlike a dual-intensity bulb, the PY21W operates at one brightness level whenever the indicator circuit is activated. It switches between off and full output as the vehicle's indicator system flashes.

These LED replacements are suitable for compatible front indicators, rear indicators and selected side indicator lamp assemblies that use a PY21W BAU15S bulb.

Powerful 1100LM Amber Output

Each bulb produces up to 1100 lumens of bright amber light, helping improve indicator visibility during daylight, poor weather and low-light driving conditions.

The LED chips generate amber light directly rather than relying on white light passing through tinted glass. This produces a rich and consistent amber colour that remains clearly visible through compatible clear or amber lamp lenses.

Instant Indicator Illumination

LED technology reaches full brightness almost instantly when electrical power is applied. This provides a sharper and more immediate indicator flash than a conventional filament bulb.

The rapid response helps communicate your intended direction clearly to other road users while creating a clean and modern flashing appearance.

Intelligent Super Canbus Technology

Each bulb incorporates an intelligent Super Canbus driver designed to reduce dashboard bulb warning messages, flickering, shut-off issues and rapid flashing on many modern vehicles.

The built-in electronics increase compatibility with vehicle bulb-monitoring systems and help reproduce the electrical characteristics expected from a conventional filament indicator bulb.

Whilst compatible with most Canbus systems, some vehicles with particularly sensitive indicator circuits may still require an additional load resistor, Canbus decoder or LED-compatible flasher relay.

Advanced Active Cooling

A built-in high-speed turbine cooling fan continuously draws heat away from the LED chips, helping maintain stable output during prolonged operation.

The fan works together with the CNC-machined aviation-grade aluminium body to improve heat dissipation and support reliable long-term performance.

360° LED Light Distribution

The multi-sided LED chip arrangement produces wide and even illumination throughout the indicator reflector.

This design helps closely replicate the position of the original filament, supporting consistent amber light distribution and improved visibility from different viewing angles.

Ideal Applications

• Front Indicator Lights
• Rear Indicator Lights
• Turn Signal Lights
• Direction Indicator Lamps
• Selected Side Indicator Applications
• Clear indicator lenses requiring an amber bulb
• Amber indicator lenses requiring a PY21W replacement
• Any compatible application requiring a PY21W bulb
• Any compatible application requiring a BAU15S base

Technical Specifications

PY21W and BAU15S Compatibility

PY21W bulbs use a BAU15S single-contact base. The base has one electrical contact on the bottom and two locating pins arranged in an offset position.

The offset pin arrangement helps prevent the bulb from being installed in an incompatible BA15S holder.

Do not confuse PY21W BAU15S bulbs with similar-looking bulb types such as:

• P21W / 382 BA15S – single contact with pins directly opposite each other
• P21/5W / 380 BAY15D – dual contact with pins positioned at different heights
• P21/4W / 566 BAZ15D – dual contact with a different keyed pin arrangement
• PR21W BAW15S – single contact with a different keyed base arrangement

These bases are not interchangeable. Please remove and inspect your existing bulb before ordering, paying particular attention to the pin positions and the number of electrical contacts.

Clear and Amber Lens Compatibility

These bulbs produce amber light directly from the LED chips and may be suitable for compatible clear indicator lenses that require an amber PY21W bulb.

They may also be used behind an amber lens where the vehicle requires the same PY21W BAU15S base. Always confirm the original bulb specification before ordering.

Package Contents

• 2 × Super Canbus PY21W Amber LED Indicator Bulbs
• Retail Presentation Box

Important Information

• Please check your existing bulb type and base before ordering.
• Designed for vehicles requiring PY21W BAU15S single-contact bulbs.
• The BAU15S base uses offset locating pins.
• Not suitable as a direct replacement for P21W BA15S bulbs.
• Do not order solely by vehicle make, model or registration number.
• Canbus compatible with most vehicles.
• Some vehicles with highly sensitive indicator monitoring may still require additional resistors, a decoder or an LED-compatible flasher relay.
• Suitable for 12V vehicle electrical systems.
• Please ensure sufficient space is available inside the lamp housing for the fan-cooled bulb body.
• Road-use legality depends on the vehicle, lamp unit and applicable lighting regulations.

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 PY21W LED bulbs fit my vehicle?

These bulbs are designed for vehicles that use a PY21W bulb with a BAU15S single-contact base. Please remove and inspect your existing bulb, consult your vehicle handbook or compare the base before ordering.

What are PY21W bulbs normally used for?

PY21W bulbs are normally used for amber signalling applications, including front indicators, rear indicators and selected side indicator lamp assemblies.

What colour light do these bulbs produce?

These bulbs produce a strong and intense amber light directly from the LED chips. They do not rely on an amber coating or tinted glass to create the colour.

What is the difference between PY21W and P21W?

PY21W normally uses a BAU15S base with offset locating pins and produces amber light. P21W normally uses a BA15S base with two pins positioned directly opposite each other. The two bases are not interchangeable.

Can these bulbs be used behind a clear indicator lens?

Yes, provided the lamp requires an amber PY21W BAU15S bulb. Because the LED chips produce amber light directly, they are suitable for many compatible clear indicator lamp units.

Can these bulbs be used behind an amber lens?

Yes, provided your vehicle uses a PY21W BAU15S bulb and the lamp housing has sufficient space for the fan-cooled LED body.

Will these bulbs flash at the correct speed?

The built-in Super Canbus electronics are designed to reduce rapid flashing on many vehicles. However, some particularly sensitive indicator systems may still require an additional load resistor, Canbus decoder or LED-compatible flasher relay.

Are these bulbs Canbus compatible?

Yes. They contain built-in Super Canbus electronics designed to reduce dashboard bulb warnings, flickering, rapid flashing and shut-off issues on many modern vehicles.

Are these bulbs polarity sensitive?

No. They use 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 includes a built-in high-speed turbine fan that helps remove heat from the LED chips and maintain stable performance during prolonged use.

Do I need to modify the wiring?

No. These bulbs are designed as a Plug & Play replacement for a compatible PY21W BAU15S socket. Additional resistors or a decoder may be required on certain sensitive vehicles.

How many bulbs are supplied?

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

Are these PY21W LED bulbs road legal?

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