Product Introduction
S21-3550112 Waterproof High-precision High-vibration Wheel Speed Sensor for Chery
The S21-3550112 Wheel Speed Sensor is a critical automotive component designed to monitor real-time wheel rotation speed, delivering precise data to vehicle safety systems. With over 10 years of manufacturing expertise in automotive sensors, it boasts a speed detection accuracy of ±0.1%—ensuring reliable signal transmission even in high-vibration scenarios.
Certified by ISO 9001 and IATF 16949, it meets strict global automotive quality standards. Its housing features IP6K9K waterproof/dustproof rating, withstanding extreme temperatures from -40℃ to 125℃. This sensor reduces system failure rates by 30% compared to generic alternatives, directly enhancing driving safety and component longevity.
Product Advantage
1. Ultra-High Detection Precision for Safety-Critical Performance
As a professional high-precision wheel speed sensor, the S21-3550112 delivers a speed detection accuracy of ±0.1%—surpassing the industry average of ±0.3%. This precision ensures real-time, error-free data transmission to key vehicle safety systems, preventing signal delays that could affect driving stability. Our R&D team has optimized the sensor’s internal circuit layout over 8 iterations, further reducing data deviation and making it a trusted choice for demanding automotive applications.
2. Dual Global Certifications for Strict Quality Compliance
The S21-3550112 Wheel Speed Sensor is fully certified by ISO 9001 (quality management system) and IATF 16949 (automotive-specific quality standard)—two credentials that require rigorous testing across 12+ quality checkpoints. Every unit undergoes 100% pre-delivery functional testing, including signal consistency and voltage stability checks, with a passing rate maintained at 99.8% for 5 consecutive years. These certifications guarantee the sensor meets global market requirements, eliminating compliance risks for our clients.
3. IP6K9K Protection & Wide Temperature Resistance
Built for harsh operating environments, this sensor features an IP6K9K waterproof wheel speed sensor design—rating it dust-tight and resistant to high-pressure, high-temperature water jets. It also withstands extreme temperatures ranging from -40℃ to 125℃, covering climate conditions from frigid northern regions to hot deserts. The housing uses high-grade PBT plastic with anti-corrosion coating, reducing material aging by 40% compared to standard plastics and extending the sensor’s service life to 80,000+ working hours.
4. 30% Lower Failure Rate Than Generic Alternatives
Backed by 10+ years of automotive sensor manufacturing experience, the S21-3550112 has a field failure rate of only 0.7%—30% lower than generic Wheel Speed Sensor options. This reliability stems from two key upgrades: a gold-plated pin connector that improves conductivity and resists oxidation, and a reinforced wire harness that reduces breakage under frequent vibration. Fewer failures mean lower after-sales costs for clients and higher customer satisfaction with end-users.
5. Stable Supply Chain with Large-Scale Production Capacity
Our factory maintains an annual production capacity of 500,000+ wheel speed sensors, including the S21-3550112 model, with a raw material stock that supports 45 days of continuous production. This scale ensures lead times are kept within 7–10 business days, even during peak demand seasons. We also source core components from 3 verified global suppliers, conducting monthly quality audits to avoid supply chain disruptions—providing clients with consistent, on-time deliveries.
Technical Parameters
| Parameter Category | Parameter Name | Specification | Remarks |
| Basic Information | Model Number | S21-3550112 | Unique part number for accurate inventory & ordering |
| Product Type | Passive/Active Wheel Speed Sensor | Optional based on customer’s system requirements |
| Performance | Speed Detection Accuracy | ±0.1% | Surpasses industry average (±0.3%) for safety-critical use |
| Signal Output Type | Analog (0.5-4.5V DC) / Digital (PWM) | Compatible with most automotive ECU systems |
| Response Time | ≤10ms | Ensures real-time data transmission to safety systems |
| Mechanical & Material | Housing Material | PBT + GF30 (Glass Fiber Reinforced Polyester) | High impact resistance & anti-aging; reduces material deformation by 40% vs. standard plastics |
| Terminal Material | Brass with Gold Plating (10-15μm thickness) | Enhances conductivity & oxidation resistance; service life extended by 50% |
| Wire Harness Length | 300mm / 400mm / Customizable | Standard lengths cover 90% of application scenarios; custom options available |
| Environmental Resistance | Operating Temperature Range | -40℃ to 125℃ | Withstands extreme climates (frigid to desert conditions) |
| Protection Rating | IP6K9K | Dust-tight & resistant to high-pressure, high-temperature water jets |
| Vibration Resistance | 10-2000Hz, 20G (Acceleration) | Complies with ISO 16750-3 automotive vibration standards |
| Certifications & Compliance | Quality Certifications | ISO 9001, IATF 16949 | Meets strict global automotive quality management requirements |
| RoHS Compliance | Yes | Free of restricted hazardous substances (Pb, Cd, Hg, etc.) |
| Electrical Specifications | Operating Voltage | 9-16V DC | Compatible with 12V automotive electrical systems |
| Current Consumption | ≤15mA (At 12V DC) | Low power consumption; no excessive battery drain |
Product Uses
Here are specific application scenarios of Wheel Speed Sensor:
1. Daily Urban Commuting & Passenger Vehicle Use
Ideal for daily commuting, this high-precision wheel speed sensor provides ±0.1% accurate speed data to vehicle safety systems (e.g., anti-lock braking). In stop-and-go city traffic, its ≤10ms response time ensures timely signal transmission, reducing braking-related system delays by 25% (vs. generic sensors). It meets IATF 16949 standards, making it reliable for long-term daily use.
2. Harsh Climate & Extreme Environment Operations
With IP6K9K waterproof and -40℃ to 125℃ temperature resistance, it performs stably in heavy rain, snow, desert heat, or frigid winters. Laboratory tests show it operates without failure for 3,000+ hours in continuous extreme temperatures—40% longer than sensors with IP67 ratings. It’s dust-tight, avoiding malfunctions from road debris in off-road or construction zone driving.
3. Commercial Vehicle High-Frequency Operations
Suited for commercial vehicles (e.g., delivery trucks) with high daily mileage, its 80,000+ hour service life cuts replacement frequency by 30%. Its 10-2000Hz vibration resistance (compliant with ISO 16750-3) withstands long-haul road vibrations, lowering field failure rates to 0.7%—critical for minimizing commercial vehicle downtime and operational costs.
4. Professional Aftermarket Repair & Replacement
As a direct-fit Wheel Speed Sensor for aftermarket use, it matches original equipment specifications 1:1. Every unit undergoes 100% pre-delivery functional testing (99.8% pass rate), ensuring no fitment or performance issues during installation. It reduces repair rework rates by 20% for workshops, saving time and improving customer satisfaction.
5. Performance Vehicle Modifications & Upgrades
For modified vehicles needing enhanced safety, its optimized internal circuit supports high-performance safety systems (e.g., electronic stability programs). It maintains precision even under high-speed conditions (up to 200km/h), with signal output stability 15% higher than standard sensors. It’s RoHS-compliant, aligning with global modification industry environmental requirements.
Product Operate Guide
Safety Prep: Ensure the vehicle’s power is fully disconnected to avoid electrical hazards—this follows IATF 16949 automotive maintenance safety standards.
Old Sensor Removal: Gently detach the old sensor’s wire connector and unfasten its mounting bolt (use a torque wrench for damage prevention).
Clean & Install: Wipe the mounting area and new sensor’s interface with a lint-free cloth; fasten the new sensor’s bolt to 8-10 N·m (industry-recommended torque). Reconnect the wire.
Function Test: Power on and use an automotive diagnostic tool to confirm stable speed signal output—this step reduces post-installation failure by 90%.
