1. Úvod
Thank you for choosing LASFIT 7440 7443 Red LED Bulbs. These bulbs are designed to provide enhanced brightness and reliability for your vehicle's tail and brake lights. Featuring an upgraded built-in resistor, they are engineered to be CANBUS error-free, preventing common issues like hyper flash. This manual provides essential information for proper installation, operation, and maintenance to ensure optimal performance.
2. Vlastnosti produktu
- CANBUS Error-Free Design: Integrated resistor eliminates hyper flash and error warnings in most vehicles.
- Vylepšený jas: Up to 500% brighter than standard halogen bulbs, providing 4800LM per brake light for improved visibility.
- Pokročilé LED čipy: Equipped with 15pcs 1860 and 3570 top-grade LED chips for 360-degree full lighting effect.
- Přímá náhrada: Designed for a perfect fit, replacing OEM 7444na, 7441, 7444, 7440NA, W21W, WY21W bulbs.
- Dlouhá životnost: Constructed with a full aviation aluminum body and a 12,000RPM turbo cooling fan, ensuring a lifespan of over 30,000 hours.
- Instalace Plug-and-Play: Non-polarity design allows for quick and easy installation without modifications.

Image: LASFIT LED Bulb with integrated CANBUS chip, illustrating error-free operation on a vehicle dashboard.

Image: Visual comparison demonstrating the significantly brighter output of the LASFIT LED bulb compared to a traditional halogen bulb.
3. Pokyny k instalaci
The LASFIT 7440 7443 LED bulbs are designed for a straightforward plug-and-play installation. No modifications are typically required. Please follow these steps:
- Locate the Bulb: Identify the tail or brake light housing on your vehicle. Consult your vehicle's owner's manual for specific access instructions.
- Remove Halogen Bulb: Carefully twist and pull out the existing halogen bulb from its socket.
- Vložte LED žárovku: Insert the new LASFIT LED bulb into the socket. The non-polarity design means it can be inserted in either direction.
- Test funkčnosti: Before fully reassembling, test the light function (tail light and brake light) to ensure proper operation.
- Zajistěte žárovku: Once confirmed working, twist the bulb and socket back into the light housing until secure.
Důležitá poznámka: If the LED does not light up after inserting, simply remove it, flip the direction, and reinstall. This addresses the polarity sensitivity mentioned in some cases.

Image: Step-by-step visual guide for replacing a halogen bulb with a LASFIT LED bulb.

Image: Methods for verifying correct bulb size and compatibility for your vehicle.
4. Návod k obsluze
Once installed, the LASFIT 7440 7443 Red LED Bulbs operate automatically with your vehicle's existing lighting system. They will function as your tail lights (dimmer illumination) and brake lights (brighter illumination) when activated by your vehicle's controls.
- Tail Light Function: Activates when your vehicle's headlights or parking lights are turned on.
- Funkce brzdového světla: Activates when the brake pedal is pressed, providing a significantly brighter red light for increased safety.

Image: Demonstration of LASFIT LED bulbs functioning as both tail and brake lights on a vehicle.
5. Údržba
LASFIT LED bulbs are designed for long-term, maintenance-free operation. Due to their durable construction and efficient cooling system, regular maintenance is not typically required. Keep the light housing clean to ensure maximum light output.

Obrázek: Interní view of the LASFIT LED bulb highlighting its advanced cooling system for extended lifespan.

Image: Lifespan comparison between LASFIT LED bulbs and standard halogen bulbs.
6. Řešení problémů
If you encounter any issues with your LASFIT LED bulbs, please refer to the following common solutions:
- Žárovka nesvítí:
- Ujistěte se, že žárovka je zcela usazena v objímce.
- Due to polarity sensitivity, if the LED does not light up, remove it, rotate it 180 degrees, and reinsert.
- Check the vehicle's fuse box for any blown fuses related to the lighting circuit.
- Hyper Flash or Error Warning on Dashboard:
- While LASFIT bulbs are designed to be CANBUS error-free, some highly sensitive vehicle systems may still trigger a warning. Ensure the bulb is correctly installed.
- If hyper flash persists, verify that the bulb type is correct for your vehicle's specific application (e.g., 7443 for brake/tail, not 7440 for turn signal if it requires a different resistance).
- Slabý nebo nerovnoměrný světelný výstup:
- Ensure the bulb is clean and free from debris.
- Verify the bulb is fully seated and making proper electrical contact.
If these steps do not resolve the issue, please contact LASFIT Customer Support.
7. Specifikace
| Atribut | Hodnota |
|---|---|
| Značka | LASFIT |
| Model | D2-7443R |
| Typ světelného zdroje | LED |
| Barva | Červený |
| Jas | 4000 Lumen (per bulb, for brake light) |
| Wattage | 24 wattů |
| Životnost | 30,000+ hodin |
| Chladicí systém | Aviation Aluminum Body, 12,000RPM Turbo Cooling Fan |
| Fit Type | Universal Fit (Direct replacement for 7444na, 7441, 7444, 7440NA, W21W, WY21W) |
| Hmotnost položky | 3.52 unce (na pár) |
| Rozměry balení | 4.76 x 2.8 x 1.26 palce |
8. Záruka a zákaznická podpora
LASFIT provides a 1letá záruka na výměnu for these LED bulbs. If you experience any issues or have questions regarding your product, please do not hesitate to contact our customer support team.
Our customer support is available 7 dní v týdnu, 24 hodin denně abychom vám pomohli.
For support, please visit the official LASFIT website or contact us through your purchase platform.
9. Produktové video
Video: Official LASFIT D2 Series LED Bulb demonstration, showcasing brightness, cooling, and CANBUS features. This video highlights the improved visibility and error-free performance of the LED bulbs compared to standard halogen lights.




