OSRAM 3850CW-02B - T4W BA9s 12V 6000K LED Bulbs (2-pack) for indoor use
Upgrade your vehicle's interior lighting with the OSRAM LEDriving PREMIUM T4W (3850CW-02B) LED bulbs, a set of two BA9s base LED bulbs that offer cool white light at 6000 K and a luminous flux of 75 lm per bulb. Their diffuser design provides homogeneous illumination without shadows, while their 1 W power consumption reduces the strain on your battery compared to traditional T4W incandescent bulbs. Installation is plug & play: simply remove the old bulb and insert the new one into the same BA9s socket. These bulbs are optimized for interior applications and, for vehicles with lighting control systems, can be used with a dedicated OSRAM CANBUS module.
Main features
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Type and socket: T4W, BA9s (LED retrofit for the same lamp holder).
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Color temperature: 6000 K (cool white) with a modern look.
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Luminous flux: 75 lm per lamp; uniform light thanks to the diffuser.
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Power consumption: 1 W (0.8 W nominal), plug & play installation on 12 V systems.
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Long service life: B3 2500 h / Tc 5000 h, reducing replacements.
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Compact dimensions: 27.4 mm long and 9 mm in diameter; weight 2.7 g.
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Compatibility: BA9s sockets commonly used in interior lighting; CANBUS control unit option available for vehicles that require it.
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Presentation: duo pack with 2 lamps.
Product benefits
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Energy efficiency and lower battery load compared to T4W incandescent lamps; consumption of only 1W per lamp.
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Visual comfort and modern aesthetics thanks to its homogeneous, flicker-free cool white light.
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Less maintenance due to its long lifespan (up to Tc 5000 h).
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Simple installation without modifications: direct replacement on BA9s bushings.
Use cases
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Interior lighting: ceiling lights, courtesy lights, glove box lights, trunk lights, instrument lighting (depending on the vehicle).
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Other points with BA9s: in exterior applications only for off-road use if the vehicle is equipped with it.
Frequently Asked Questions
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Is it legal to use them on the road? For exterior applications, they are not ECE approved and should not be used on public roads. Indoors, they can be used as LED retrofits.
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Do they work on 24V? No, this model is designed for 12V .
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Will they trigger a bulb error (CANBUS)? In some sensitive vehicles, an OSRAM CANBUS module may be necessary to prevent warnings on the dashboard.
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How do they differ from version 3850WW-02B? The code CW indicates Cool White 6000 K; the reference WW corresponds to Warm White 4000 K.
Compatibility and installation
Verify that the light fixture uses a BA9s (T4W) socket and that the system is 12V . Installation is straightforward (remove/install). If your vehicle has bulb diagnostics and a warning light illuminates after the bulb change, add the OSRAM LEDriving CANBUS Control Unit specifically designed for BA9s bulbs.
Legal and safety notes
These lamps are not ECE approved for outdoor applications. For road use on the exterior of the vehicle, comply with current regulations. Do not touch the diffuser with dirty hands or expose it to moisture during installation.
Project description
OSRAM LEDriving PREMIUM T4W LED retrofit lamp, reference 3850CW-02B, BA9s socket, 12 V; input power 1 W (0.8 W nominal); luminous flux 75 lm; color temperature 6000 K; dimensions 27.4 × 9 mm (length × diameter); weight 2.7 g; lifespan B3 2500 h / Tc 5000 h; pack of 2 units; recommended use: vehicle interior (not ECE for exterior).
