582A Bulb 12V 21W Amber WY21W - Indicator Light Bulb - Classic

High-quality 12-volt, 21-watt amber indicator bulb designed for clear, bright, and consistent signalling in vehicle indicator systems.
The Classic 582A bulb (also known as WY21W) features a capless wedge design with W3x16d base and intense amber glass for optimal visibility. E-marked and road legal for UK and European vehicles, ideal for front or rear indicators behind clear lenses.

Key Features

• Intense Amber Colour: Bright amber glass provides superior visibility for indicator signalling
• Capless Wedge Design: W3x16d base plugs directly into socket for quick, tool-free installation
• High Output: 21W halogen power for bright, consistent light output
• Clear Lens Compatible: Perfect for front or rear indicators behind clear lenses
• Road Legal: E-marked approval for UK and European compliance
• Single Filament: Reliable halogen technology for consistent performance
• Direct Replacement: Compatible with existing 582A/WY21W bulb sockets

Technical Specifications

Application & Usage Guide

Primary Application:

• Front indicator lights (turn signals)
• Rear indicator lights (turn signals)
• Side repeater indicators (on some vehicles)

Also Known As: WY21W, T20 amber bulb, 582A indicator bulb

Why Amber Bulbs? The 582A amber bulb is specifically designed for use behind clear indicator lenses. The amber glass ensures compliance with road regulations requiring orange/amber indicator lights, while allowing vehicle manufacturers to use clear lens covers for aesthetic purposes.

Installation: The capless wedge design allows for simple push-fit installation directly into the bulb socket. No tools required. Always ensure the ignition is off before replacing bulbs and replace in pairs for consistent appearance.

Compatibility: Suitable for most 12V DC automotive electrical systems. Check your vehicle handbook or existing bulb to confirm 582A/WY21W fitment before purchase.

Important Safety & Compatibility Information

• Always verify bulb type in your vehicle handbook before purchasing
• Switch off ignition and allow bulbs to cool before handling
• Do not touch glass with bare hands; use a clean cloth to avoid oil contamination
• Ensure bulb is correctly seated in socket to prevent moisture ingress
• Replace indicator bulbs in pairs for consistent light output and appearance
• Amber bulbs are required for indicators in the UK and EU - do not substitute with clear bulbs
• Dispose of used bulbs responsibly at household waste recycling centres
• Keep out of reach of children

SHIPPING & RETURNS

Shipping:

• Fast UK delivery available
• Local collection option at checkout
• Orders dispatched within 1-2 working days
• Tracked shipping on all orders

Returns:

• 14-day return policy on unopened products
• Items must be unused and in original packaging
• Contact gtmotorspart@outlook.com for return authorization
• Opened bulbs are non-returnable for safety and hygiene reasons

WHY CHOOSE US

• Trusted Quality: Genuine OEM-approved parts and premium fluids from authorized suppliers
• Competitive Pricing: Best value on premium automotive oils and maintenance products
• Fast Local Delivery & Collection: Quick dispatch with flexible delivery and collection options across the UK
• Friendly Support: Expert advice and customer service from automotive specialists