Classic
582 Bulb 12V 21W W21W - Brake Indicator Reverse Light Bulb - Classic
582 Bulb 12V 21W W21W - Brake Indicator Reverse Light Bulb - Classic
Couldn't load pickup availability
Classic 582 12V 21W Bulb (W21W)
High-quality 12-volt, 21-watt incandescent automotive bulb for brake lights, indicators, reverse lights, and rear fog lights.
The Classic 582 bulb (also known as W21W) features a capless wedge design with W3x16d base, delivering reliable 460-lumen output for essential exterior lighting applications. E-marked and road legal for UK and European vehicles.
Key Features
- Capless Wedge Design: W3x16d base plugs directly into socket for quick, tool-free installation
- High Output: 21W power delivers approximately 460 lumens for bright, visible signaling
- Multi-Purpose Application: Suitable for brake lights, indicators, reverse lights, and rear fog lights
- Road Legal: E-marked approval for UK and European compliance
- Single Filament: Reliable incandescent technology for consistent performance
- Standard Clear Glass: Provides bright white light output
- 12V DC Compatible: Designed for standard automotive electrical systems
Technical Specifications
| Bulb Reference | 582 (W21W) |
| Voltage | 12V DC |
| Wattage | 21W |
| Base Type | W3x16d (Wedge Base / Capless) |
| Bulb Type | Incandescent, Single Filament |
| Brightness | Approximately 460 lumens |
| Colour | Clear (Standard White Light) |
| Dimensions | Approx. 4.0 cm height × 2.0 cm width |
| Approval | E-marked, Road Legal |
| Pack Type | Single Bulb |
Application & Usage Guide
Common Applications:
- Brake lights (stop lights)
- Rear indicator lights (turn signals)
- Reverse lights (backup lights)
- Rear fog lights
- Tail lights (on some vehicles)
Also Known As: W21W, T20 bulb (in some markets)
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.
Compatibility: Suitable for most 12V DC automotive electrical systems. Check your vehicle handbook or existing bulb to confirm 582/W21W 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 bulbs in pairs for consistent light output and appearance
- 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
