Lamp 2 Pole P21/4W 12V 21/4W 891.521

This genuine OSRAM Lamp 2 Pole P21/4W 12V 21/4W 891.521 ensures reliable signal illumination for critical automotive applications. Manufactured in Slovakia, this component adheres to stringent automotive industry standards, guaranteeing operational integrity and consistent performance.

Technical Specifications

• Lamp Designation: P21/4W, defining specific base and filament configurations.
• Voltage Rating: 12 Volts DC, compatible with standard vehicle electrical systems.
• Wattage Output: Dual-filament design providing 21 Watts for primary function (e.g., stop light) and 4 Watts for secondary function (e.g., tail light).
• Base Type: BAY15d, a standardized bulb base with two offset contact pins for correct insertion.
• OSRAM Part Number: 891.521.
• Supplier SKU: 7225.
• Manufacturing Origin: Slovakia, affirming adherence to European quality standards.
• Regulatory Compliance: Conforms to ECE Regulation 37 (ECE R37), ensuring road legality and operational safety.
• Filament Construction: Robust design for extended lifespan under typical automotive vibration and thermal cycles.

Compatibility & Fitment

• Primary Application: Engineered for automotive applications requiring dual-intensity illumination from a single bulb, commonly in rear lamp assemblies for combined stop/tail or turn signal/parking functions.
• Socket Interface: Direct fitment into any standard BAY15d socket designed for 12V P21/4W bulbs. Verification of existing bulb type and socket configuration is imperative prior to installation.
• Vehicle System Integration: Compatible with 12-volt DC electrical systems prevalent in passenger vehicles.
• Cross-Reference: Users are advised to consult their vehicle\u2019s service manual or existing bulb markings to confirm specific bulb specifications for their make, model, and year.
• Universal Replacement: Serves as a direct, form-fit, and function-identical replacement for any P21/4W 12V 21/4W bulb with a BAY15d base, provided specifications match.

Key Performance Benefits

• Optimized Dual-Intensity Signaling: P21/4W configuration delivers distinct 21-watt and 4-watt illumination levels, crucial for clearly differentiating primary and secondary signaling functions (e.g., bright stop vs. dimmer tail light). This differentiation enhances vehicle communication.
• Enhanced Visibility and Safety: OSRAM precision engineering ensures optimal filament positioning and glass clarity, maximizing light output and distribution. This improves vehicle visibility for other road users, reducing accident potential by providing clear signals.
• Reliable Long-Term Operation: Constructed with high-grade materials and stringent manufacturing controls for durability. Robust filament structure resists premature failure from road vibrations and thermal cycling, ensuring consistent performance.
• OEM-Standard Quality Assurance: Manufactured to original equipment standards by OSRAM, meeting exact specifications and quality benchmarks set by vehicle manufacturers. This guarantees compatibility, functionality, and longevity equivalent to factory components.
• Regulatory Adherence: Fully compliant with international automotive lighting regulations, including ECE R37. This guarantees the bulb's light output and design meet legal requirements for road use.
• Cost-Effective Maintenance: Offers a reliable and long-lasting replacement, reducing replacement frequency and contributing to lower long-term vehicle maintenance costs.

Authenticity Guarantee

Each OSRAM Lamp 2 Pole P21/4W 12V 21/4W 891.521 (SKU 7225) is an authentic OSRAM component. Direct sourcing from OSRAM's manufacturing facility in Slovakia ensures rigorous testing and quality control processes. This eliminates risks of aftermarket imitations, which often compromise performance or cause electrical issues. Investing in genuine OSRAM parts safeguards the operational integrity of your vehicle's lighting system, maintaining design-level safety and functionality. Verify OSRAM branding and part numbers on the product packaging for assurance.

Prioritize vehicle safety and maintain system integrity by utilizing genuine OSRAM lighting solutions for all replacement and maintenance requirements.