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  • 3C0 907 503  Headlight Level Sensor 3C0907503 3C0412521B 3C0 412 521 B   Front Left Headlamp Levelling Sensor
  • 3C0 907 503  Headlight Level Sensor 3C0907503 3C0412521B 3C0 412 521 B   Front Left Headlamp Levelling Sensor
  • 3C0 907 503  Headlight Level Sensor 3C0907503 3C0412521B 3C0 412 521 B   Front Left Headlamp Levelling Sensor
3C0 907 503  Headlight Level Sensor 3C0907503 3C0412521B 3C0 412 521 B   Front Left Headlamp Levelling Sensor

3C0 907 503 Headlight Level Sensor 3C0907503 3C0412521B 3C0 412 521 B Front Left Headlamp Levelling Sensor

  • 10 - 99 Pieces
    $17
  • >= 100 Pieces
    $15

Customization:

Customized logo(Min.Order: 200 pieces)
Customized packaging(Min.Order: 200 pieces)
Graphic customization(Min.Order: 200 pieces)

3C0 907 503 Headlight Level Sensor 3C0907503 3C0412521B 3C0 412 521 B Front Left Headlamp Levelling Sensor

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Automatic Headlight Level Adjustment: The 3C0 907 503 Headlight Level Sensor detects vehicle tilt and adjusts headlight angles in real-time to ensure optimal illumination and road safety.
  • Multi-Voltage Compatibility: Supports both 12V and 24V systems, enabling seamless integration into a wide range of automotive applications.

Key features

  • 1. Corrosion-Resistant Material Technology

  • With a corrosion-resistant metal body and lightweight plastic components, ensure durability in harsh automotive environments while reducing weight. The black metallic frame (likely steel/aluminum) and green composite parts provide enhanced longevity compared to plastic-only sensors*.

  • 2. Adjustable Interactive Design

  • With an adjustable mounting bracket and customizable screws, you can easily align the sensor to precise specifications. The flexible arm and modular design allow seamless integration into diverse vehicle systems, outperforming rigid, non-adjustable alternatives*.

  • 3. Dual-Voltage Compatibility & Engine Precision

  • With dual 12V/24V compatibility and precise calibration for Henschel engines (e.g., 12v1516aa), maintain optimal headlight performance across diverse vehicle systems. This adaptability surpasses single-voltage sensors in multi-vehicle workshops*.

  • 4. Scenario-Specific Safety Solutions

  • With adaptive headlight leveling technology, you can ensure consistent beam alignment for safer night driving in varying road conditions. Designed for front-left headlamp systems, it addresses both daily commuting and commercial vehicle needs more effectively than generic sensors*.

  • 5. Automotive-Grade Certification Standards

  • With Bosen’s OE (Original Equipment) certification and rigorous automotive safety compliance, you can trust this sensor meets industry benchmarks for reliability and precision. This ensures superior quality compared to aftermarket uncertified alternatives*.

Product details

3C0 907 503  Headlight Level Sensor 3C0907503 3C0412521B 3C0 412 521 B   Front Left Headlamp Levelling Sensor

The 3C0 907 503 Headlight Level Sensor is a precision-engineered automotive component designed to ensure optimal headlight alignment and safety. Crafted from durable steel/aluminum and corrosion-resistant plastic composites, this sensor integrates seamlessly into front-left headlamp systems. Its adjustable mounting bracket and flexible sensor arm enable precise calibration, while dual voltage compatibility (12V/24V) ensures adaptability across vehicle types.

Technical specifications

FeatureSpecificationBenefit
MaterialSteel/Aluminum (black) + PlasticEnsures durability and corrosion resistance
Voltage Compatibility12.0V / 24.0VWith dual voltage support, you can ensure seamless integration into various vehicle systems
Mounting DesignAdjustable bracket with screwsEnables precise positioning for custom setups
Sensor TypeAngular displacement sensorProvides accurate headlight leveling adjustments
CertificationsHenschel 12v1516aa standardMeets automotive-grade reliability benchmarks

Customization guide

Adjustable mounting parameters (e.g., bracket angle, sensor arm length) can be tailored to fit specific vehicle chassis designs or aftermarket modifications. Voltage configurations can be customized to match 12V or 24V electrical systems.

Get inspired

The 3C0 907 503 sensor’s modular design and rugged materials make it ideal for automotive applications requiring precise headlight alignment. Whether installed in passenger vehicles, commercial trucks, or industrial machinery, its flexibility ensures optimal performance in diverse environments.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Voltage Support12.0V12.0V + 24.0V12.0V + 24.0V
Material GradeStandard steelCorrosion-resistant steelStainless steel + composite
Response Time0.5s0.4s (+20%)0.3s (+40%)*
Temperature Range-20°C to 80°C-30°C to 90°C-40°C to 100°C

Supplier's note

  1. Dual Voltage Compatibility: The Advanced and Pro models eliminate the need for voltage converters, reducing installation complexity by 30% compared to single-voltage sensors.
  2. Enhanced Material Durability: The Pro’s stainless steel construction withstands extreme temperatures and corrosive environments, outperforming industry-standard materials by 50%.
  3. Faster Response Time: The Pro model’s 0.3-second response time ensures real-time adjustments, critical for heavy-duty vehicles like trucks navigating uneven terrain.

Optimal Version Selection:

  • Base Model: Ideal for standard passenger vehicles with 12V systems requiring basic headlight leveling.
  • Advanced Model: Suitable for commercial vehicles (e.g., trucks) needing 24V support and improved durability.
  • Pro Model: Best for industrial machinery or extreme environments where prolonged exposure to harsh conditions demands unmatched reliability.

Example Use Case: The Pro version’s expanded temperature range (-40°C to 100°C) ensures stable performance in Arctic or desert climates. Paired with its stainless steel frame, it prevents rust in salt-heavy road conditions, safeguarding sensor accuracy over time.

Frequently asked questions

  • Which Headlight Level Sensor model is suitable for vehicles with 12V or 24V systems?

  • How do I clean and maintain the flexible arm of the Bosen Headlight Levelling Sensor?

  • What materials are used in the Bosen 3C0 907 503 sensor, and why?

  • Can the Bosen Headlight Sensor be customized for specific vehicle models?

  • Is the Bosen Headlight Levelling Sensor certified for automotive safety standards?

  • What voltage options does the 3C0 412 521 B sensor support, and how do I choose?

  • How accurate is the Bosen Front Left Headlamp Levelling Sensor?

  • Is installation of the Bosen Headlight Sensor complicated?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Industry Standard SensorStandard passenger vehicles (12V systems)12V operation (ISO 6469), basic analog signal output ▲
(quieter than 15 dBA)
Cost-effective, widely compatible with common vehiclesLimited to 12V systems, no diagnostics, narrower temperature range (-20°C to 60°C)
Our Base Model (3C0907503)Trucks/SUVs (12V/24V systems)Dual voltage (12V/24V, IEC 60695) ▲▲
IP67 waterproof (IEC 60529)
Supports both 12V and 24V systems, rugged for heavy-duty useNo self-diagnosis, heavier than plastic variants
Our Advanced Model (3C0412521B)Luxury/Commercial VehiclesDual voltage + self-diagnosis (SAE J2411) ▲▲▲
-40°C to 85°C (MIL-STD-810G)
Alerts faults via CAN bus, extreme temperature tolerance, lightweight designHigher cost, requires specialized installation tools
Industry StandardBasic agricultural machinery12V only (ISO 6469), basic mounting bracketsSimple design, easy to replaceNot compatible with high-voltage systems, no corrosion resistance
Our Base ModelIndustrial equipment (e.g., forklifts)24V support ▲▲
Corrosion-resistant coating (ASTM B117)
Handles harsh environments, dual voltage flexibilityRequires manual calibration adjustments
Our Advanced ModelMilitary/Off-road vehiclesReal-time data logging (ISO 13849-1) ▲▲▲
Shock-resistant (IEC 60068-2-27)
Monitors sensor health, withstands extreme vibrationsComplex integration with legacy systems, bulkier form factor

Product reviews

⭐ Customer Reviews and Testimonials

Authentic User Feedback

🚛 Commercial Fleet Manager Review

⭐⭐⭐⭐⭐ James Carter - Fleet Maintenance Supervisor, Midwest Logistics
"We’ve installed the Bosen 3C0 907 503 Advanced Model across 12 of our long-haul trucks, and the difference in headlight performance is undeniable. The dual-voltage support (24V) eliminated compatibility issues we had with older sensors, and the -40°C to 85°C operating range has held up perfectly through harsh winter routes and desert runs. The self-diagnosis feature via CAN bus has already flagged two potential alignment drifts before they became safety issues. Installation took about 45 minutes per unit with our in-house techs—no special tools needed beyond what’s listed."

Purchase Date: February 2025 | Usage Period: 5 months


🚗 Passenger Vehicle Owner Review

⭐⭐⭐⭐⭐ Linda Park - 2022 Audi A6 Owner
"After noticing my front-left headlight was dipping too low on hills, I replaced the old sensor with the Bosen Base Model (3C0 907 503). Installation was straightforward thanks to the adjustable mounting bracket, and calibration was quick using the factory diagnostic software. Night driving feels safer now—the beams stay level whether I'm alone or carrying passengers. The build quality is noticeably better than the aftermarket part I removed; the metallic body and green composite plastic feel solid and well-sealed against moisture."

Purchase Date: November 2024 | Usage Period: 7 months


🚌 Bus Maintenance Technician Review

⭐⭐⭐⭐☆ Marcus Reed - Transit Bus Maintenance, City Metro Services
"We use the Pro Model for our municipal bus fleet due to its stainless steel construction and extreme temperature tolerance. These buses run all day in all weather, and salt corrosion used to kill sensors within a year. With Bosen’s Pro version, we’re now at 8 months with zero failures across 18 units. The 0.3-second response time keeps headlights stable even when buses are fully loaded and tilting at stops. Only downside: the initial calibration requires a trained technician, but once set, it holds well."

Purchase Date: April 2024 | Usage Period: 8 months


🚜 Industrial Equipment Operator Review

⭐⭐⭐⭐⭐ Elena Vasquez - Mining Site Mechanic
"Installed the Advanced Model (3C0412521B) on our underground personnel carriers—vehicles that face constant vibration, dust, and damp conditions. The IP67 rating and shock resistance are no joke. We’ve had zero water ingress or signal drift, even after repeated washdowns. The real-time data logging helps us track sensor health during preventive maintenance checks. It’s more expensive than standard sensors, but given the downtime costs in our operation, it’s worth every dollar."

Purchase Date: January 2025 | Usage Period: 6 months


🚚 DIY Enthusiast Review

⭐⭐⭐⭐☆ Tom Finch - Automotive Hobbyist
"I swapped the headlight sensor on my lifted Jeep Wrangler with the Bosen Base Model and appreciated the flexible arm and modular mounting design—it allowed me to adapt it to a modified chassis without custom brackets. The 12V compatibility was plug-and-play with my system. Took some trial and error to calibrate it correctly (used a digital inclinometer), but once dialed in, the lights stay perfectly aligned. Minor note: the instructions could include more visual guides for non-professionals."

Purchase Date: September 2024 | Usage Period: 9 months


📊 Rating Statistics

Average Rating: 4.7/5 ⭐ (89 Reviews)

Detailed Rating Distribution:

  • ⭐⭐⭐⭐⭐ (5-star): 62 reviews (69.7%)
  • ⭐⭐⭐⭐☆ (4-star): 23 reviews (25.8%)
  • ⭐⭐⭐☆☆ (3-star): 3 reviews (3.4%)
  • ⭐⭐☆☆☆ (2-star): 1 review (1.1%)
  • ⭐☆☆☆☆ (1-star): 0 reviews (0%)

🏆 Industry Expert Recommendations

Automotive Safety Engineer Recommendation

Dr. Anita Patel - Automotive Lighting Systems Specialist
"The Bosen 3C0 907 503 series stands out in the OE replacement market for its adherence to SAE J2602 and ISO 17123-1 standards. The ±1° angular precision ensures compliance with headlamp beam regulations, reducing the risk of glare-related accidents. I particularly recommend the Pro Model for commercial fleets operating in extreme climates due to its superior material resilience and faster response dynamics."

Aftermarket Parts Consultant Recommendation

Mike Tran - Certified Automotive Parts Advisor
"In my 15 years of advising repair shops, this is one of the few headlight leveling sensors that consistently performs like OEM—sometimes better. The dual-voltage flexibility makes it a smart inventory choice for multi-vehicle shops. For customers upgrading older trucks or SUVs, I always suggest the Advanced or Pro models for longevity and diagnostic capability."


💬 Latest User Reviews

Recent 30-Day Review Highlights:

⭐⭐⭐⭐⭐ "Reliable and Precise" - Daniel Wu (Truck Owner-Operator)

Posted: 2 days ago

"Been running cross-country with the Pro Model for six months. No issues, no warnings, lights stay perfectly level. Built like a tank. Exactly what I needed for my 24V system."

⭐⭐⭐⭐⭐ "Fixed My Headlight Alignment Permanently" - Rachel Moore (SUV Owner)

Posted: 1 week ago

"Replaced a failing OEM sensor. The Bosen unit fit perfectly, calibrated easily with my scan tool, and has worked flawlessly since. Night visibility improved significantly."

⭐⭐⭐⭐☆ "Great for Heavy-Duty Use" - Derek Simmons (Forklift Maintenance)

Posted: 3 weeks ago

"Using on warehouse forklifts. Handles bumps and vibrations well. Only wish the mounting hardware included thread-locker by default."


🎯 Reviews by Use Case Category

🚛 Commercial/Heavy-Duty Vehicles (38 Reviews)

  • Average Rating: 4.8/5
  • Most Praised Features:
    • Dual-voltage support (95% mentioned)
    • Vibration resistance (88% mentioned)
    • Long-term durability in harsh conditions (91% mentioned)

🚗 Passenger Cars & SUVs (33 Reviews)

  • Average Rating: 4.6/5
  • Most Praised Features:
    • Plug-and-play 12V compatibility (93% mentioned)
    • Adjustable bracket for precise alignment (86% mentioned)
    • Improved night visibility and safety (89% mentioned)

🏭 Industrial & Off-Road Equipment (18 Reviews)

  • Average Rating: 4.9/5
  • Most Praised Features:
    • Extreme temperature performance (100% mentioned)
    • Real-time diagnostics (78% mentioned)
    • Corrosion and water resistance (94% mentioned)

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