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Front Left (Driver Side) Air Suspension Height Level Sensor for Tesla Model S/X (2012-2021) | 1027941-00-B
As the "eyes" of your Tesla Model S/X’s air suspension system, this OEM-grade height level sensor (Part No. 1027941-00-B) is engineered exclusively for 2012–2021 Model S and Model X vehicles. It’s mounted on the front left (driver side) suspension, constantly monitoring ride height to keep your Tesla level, stable, and comfortable—whether you’re navigating potholes, loading cargo, or driving at highway speeds. A faulty sensor ruins your air suspension’s performance; this replacement restores the precise, factory-like control you expect.
1. Key Specifications & Compatibility
Feature
Details
Part Number
1027941-00-B
Compatible Vehicle
Tesla Model S (2012–2021) & Tesla Model X (2012–2021) (all trims with factory air suspension)
Mounting Position
Front left (driver side) suspension assembly (links to control arm and chassis)
Sensor Type
Hall-effect magnetic sensor (delivers real-time, digital height data—no analog signal lag)
Measurement Range
0–150mm (tracks suspension travel to ±0.5mm accuracy for precise leveling)
Operating Voltage
12V DC (matches Model S/X’s on-board electrical system)
Protection Rating
IP6K9K (dust-tight; resistant to high-pressure water jets and road salt—ideal for all weather)
Connector Type
3-pin OEM-matched electrical connector (plug-and-play with factory wiring)
2. Why This Sensor Is Critical for Your Model S/X’s Air Suspension
Your Tesla’s air suspension is a marvel of engineering—but it can’t work without accurate height data. The 1027941-00-B sensor does three non-negotiable jobs:
Maintains Level Ride: Detects if the front left side sags (e.g., from heavy cargo or a worn air spring) and sends data to the suspension controller. The system then inflates/deflates the air spring to keep the vehicle level, preventing uneven tire wear and improving handling.
Adapts to Driving Modes: Works with "Comfort," "Sport," or "Highway" modes—lowers the suspension at high speeds for aerodynamics, or raises it over rough roads (the sensor confirms the suspension reaches the correct height).
Protects Suspension Components: Alerts the system if the suspension is overextended (e.g., hitting a deep pothole), preventing damage to air springs, struts, or control arms.
A failing sensor turns these benefits into headaches: your Tesla may sag on the front left, bounce uncontrollably, or refuse to switch driving modes. Worse, it can trigger "Air Suspension Fault" alerts that limit your vehicle’s speed to 50mph (80km/h) for safety.
3. What It Actually Does (No Tech Jargon)
Real-Time Height Checks: Every time you drive, the sensor uses a small magnet to track how far the front left suspension moves up/down. It sends this data to your Tesla’s suspension computer 50x per second—faster than the blink of an eye.
Fixes Sagging: If you load luggage in the front trunk (frunk) or have passengers in the front seat, the sensor notices the front left drops and tells the air spring to inflate—keeping the car level so your steering feels responsive.
Works in All Conditions: Rain, snow, or salted roads won’t damage it. The IP6K9K rating means it handles high-pressure car washes and winter road grime without shorting out.
No Lag, No Guesswork: Unlike old analog sensors, this Hall-effect sensor delivers digital data—so the suspension reacts instantly (no waiting for the system to "catch up" to uneven roads).
4. Signs Yours Needs Replacement
Don’t ignore these red flags—they mean your sensor is failing:
Front Left Sagging: The front left side sits lower than the front right (you’ll notice uneven tire clearance above the wheel).
"Air Suspension Fault" Alert: Your touchscreen shows this warning, and the suspension may lock in "Safe Mode" (limited speed, no height adjustments).
Unstable Ride: The front left bounces over small bumps, or the vehicle leans heavily during turns (the sensor isn’t sending accurate height data to the controller).
Driving Modes Don’t Work: The suspension won’t lower for "Highway" mode or raise for "Off-Road" mode (the sensor can’t confirm height changes).
Erratic Height Changes: The suspension inflates/deflates randomly (the sensor is sending false data to the system).
5. Why It Beats Aftermarket Alternatives
Generic height sensors cut corners—this one is built for your Model S/X:
Tesla-Exact Calibration: Programmed with the exact height thresholds for 2012–2021 Model S/X. No "false fault" alerts (a common issue with generic sensors that don’t match Tesla’s software).
Perfect Fit: Mounts to the front left control arm and chassis using factory holes—no drilling, grinding, or zip-ties. The 3-pin connector plugs directly into the original wiring harness (no wire splicing).
Durable Build: The sensor housing is made of glass-filled nylon (resists impact from road debris) and the connector is coated with anti-corrosion plating (prevents rust from road salt).
Long-Lasting Accuracy: Hall-effect technology doesn’t wear out like analog sensors—this one maintains ±0.5mm accuracy for 100,000+ miles (vs. generic sensors that drift after 30,000 miles).
6. Installation & What You Get
1x Front Left (Driver Side) Air Suspension Height Level Sensor (1027941-00-B)
Digital Installation Guide: Step-by-step photos, how to safely lift the front of your Model S/X, and tips to avoid damaging the air spring during installation.
Note: Moderate DIY skill recommended. You’ll need a jack, jack stands, and a torque wrench. For best results, reset the air suspension system via Tesla’s touchscreen (Settings > Service > Air Suspension Reset) after installation to calibrate the new sensor.
7. After-Sales Peace of Mind
Warranty: Backed by a 1-year limited warranty. If the sensor fails due to manufacturing defects (e.g., electrical failure, inaccurate readings), we offer free replacement.
Technical Support: Our team of EV specialists is available to answer installation questions (via email or chat) if you get stuck.
Company Profile
Guangzhou Fuheng Auto Parts Supply Chain Co., Ltd., located in the Guangzhou auto parts business district, adheres to the business philosophy of "quality first, pragmatic innovation, service-oriented, and co creation and win-win", and has estab... Company Profile
Guangzhou Fuheng Auto Parts Supply Chain Co., Ltd., located in the Guangzhou auto parts business district, adheres to the business philosophy of "quality first, pragmatic innovation, service-oriented, and co creation and win-win", and has estab...
