Auto left height Level Sensor for Volvo Body height sensor OE 31288271 Headlight range adjustment Front axle left

Product Description:

Car vehicle height sensor

OE numbers: 31288271

Applicable vehicle type: For Volvo

The car height sensor is a key component in the modern vehicle suspension system, especially in models equipped with air suspension or active suspension systems. It acts like a 'measurer', real-time monitoring changes in body height and feeding the information back to the control unit to ensure the vehicle maintains a stable driving posture and optimal safety.

Important function:

• Maintain Vehicle Level: Regardless of the number of passengers or the weight of luggage, it can automatically maintain the basic unchanged body height, improving stability and comfort.
• Enhance Safety: By preventing the vehicle from "nosing up" and "nosing down", it enhances the ability to resist pitching and rolling. At the same time, it ensures that the headlight illumination height is always accurate, avoiding dazzling other road users.
• Intelligent Adaptation: In some advanced systems, it can also automatically adjust the body height according to preset driving modes (such as city/highway) to optimize efficiency and performance.

Detection and Maintenance Points

• Power Supply Detection: Turn the ignition to ON with the plug unplugged, measure the voltage between the power supply pin and ground, which should be 12 V (or 5 V).
• Signal Waveform: Observe the output with an oscilloscope; it should be a clean rectangular wave or smooth analog voltage, without noise or frame loss.
• Mechanical Inspection: Move the linkage; the rotating shaft should have no jamming or looseness; the spherical head axial clearance ≤ 0.3 mm.
• Calibration: After replacing the sensor or disassembling/assembling the suspension, use a diagnostic tool to perform 'Height Zero Point Calibration' and 'Headlight Initialization'.

• 20 years of specialized auto parts industry experience
• Expert technical team for comprehensive support
• Direct partnerships with repair shops for real-world feedback
• Premium quality parts ensuring reliability and durability
• Extensive inventory with over 500,000+ items ready to ship
• Responsive customer service with quick turnaround
• Customized solutions for specific vehicle requirements
• Professional technical guidance and installation support
• Comprehensive 12-month warranty coverage
• Competitive pricing through optimized supply chains
• Rigorous quality control meeting industry standards
• Efficient global shipping via multiple carriers