Automotive replacement bulbs designed to restore auxiliary signalling and improve visibility on the road. Peace of mind for drivers needing dependable, easy-to-fit replacements between services. Are Simply Auxiliary Bulbs S380BL the sensible swap for routine bulb maintenance?
⚡ At a Glance
- • Visibility: P21/5W dual-filament construction aimed at clearer brake and tail signalling
- • Best for: Drivers needing direct-replacement auxiliary bulbs with BAY15D fitment
- • Not ideal for: Owners looking to upgrade to LED or non P21/5W specifications
P21/5W halogen auxiliary bulbs with a BAY15D base supplied in blister packs. Marketed for high performance and maximum visibility on compatible vehicles.
Clearer rear signalling - thanks to P21/5W dual-filament construction
Dual-filament 21/5W design uses a higher-wattage filament for braking and a lower-wattage filament for tail/indicator functions, switching the active filament via the vehicle's lamp circuit. The 12V rating matches standard passenger-car electrical systems.
Brighter, more noticeable brake light when slowing with correct tail illumination at idle, helping other drivers react sooner.
Simple replacement - with BAY15D bayonet base compatibility
BAY15D bayonet base fits the standard push-and-twist sockets used for many auxiliary lamp holders, removing the need for adapters or wiring changes. Blister packaging keeps contacts protected before installation.
Quick, plug-in swap during routine maintenance, supporting straightforward DIY fitment reported by users.
Suitable for MOT preparation - thanks to high-performance specification and user reports
Bulbs are described as high performance and supplied to retain expected signalling output; user feedback indicates successful MOT outcomes after replacement. Supply in blister packs reduces handling damage risk prior to fitting.
Practical choice for drivers replacing failed bulbs ahead of an MOT, with real users noting successful checks after fitting.
✨ The 4 Key Reasons for Simply Auxiliary Bulbs S380BL
Value compared to high-street - Users report equal quality at lower overall cost
Verified Sportage fit - Owners report straightforward installation on Kia Sportage models
MOT pass reports - Multiple users confirmed bulbs passed MOT after replacement
Quick delivery - Fast shipping reported for prompt replacement when needed
📋 Technical Details at a Glance
- Category: Automotive Parts and Accessories
- Bulb type: P21/5W
- Wattage: 21/5W
- Voltage: 12V
- Base: BAY15D
❓ Frequently Asked Questions
Q: Will these bulbs fit my car?
A: Check the vehicle's lamp specification; these are P21/5W bulbs with a BAY15D base, so they fit vehicles requiring that exact bulb type and base.
Q: Are these suitable for an MOT check?
A: Several user reports indicate successful MOT passes after fitting the bulbs, suggesting suitability when the correct specification is used.
Q: Are they high performance or standard halogen bulbs?
A: The items are described as high performance for maximum visibility and are supplied as P21/5W halogen auxiliary bulbs in blister packaging.
🏆 Our Verdict
Suitable for drivers seeking dependable, direct-replacement auxiliary bulbs with straightforward fitment and good user feedback. The combination of P21/5W dual-filament design and BAY15D compatibility focuses on clear braking and tail signalling, with users noting successful MOT outcomes. Good value versus high-street alternatives, making these a sensible choice for routine maintenance.
