Rear Left (Driver Side) Air Suspension Height Level Sensor for Tesla Model S/X (2012-2021) | 1027971-00-A

1. Key Specifications & Compatibility

2. Why This Sensor Is Make-or-Break for Your Air Suspension

1. Balances Loads: Detects if the rear left sags (e.g., from heavy luggage in the trunk or rear passenger weight) and sends data to the suspension controller. The system inflates/deflates the rear-left air spring to level the vehicle, preventing uneven tire wear and wobbly handling.
2. Adapts to Road & Speed: Works with "Comfort," "Sport," and "Highway" modes—lowers the rear suspension at high speeds to cut aerodynamic drag, or raises it to clear potholes (the sensor confirms the suspension reaches the correct height).
3. Protects Expensive Components: Alerts the system if the rear-left suspension is overextended (e.g., hitting a deep rut), preventing damage to air springs, struts, or control arms.

3. What It Actually Does (No Tech Jargon)

• Constant Height Checks: 50 times per second, the sensor uses a built-in optical disc and magnet to track how far the rear-left suspension moves up/down. It sends this data to your Tesla’s suspension computer instantly—faster than you can blink.
• Fixes Sagging: If you load cargo in the rear trunk, the sensor notices the rear left drops and tells the air spring to inflate. This keeps the car level, so your ride stays smooth and your steering doesn’t pull to one side.
• Tough Enough for All Weather: Rain, snow, salted roads, or high-pressure car washes won’t damage it. The IP6K9K rating means it handles even harsh winter grime without shorting out.
• No Guesswork: Unlike old analog sensors, this digital sensor never "drifts"—it gives accurate readings every time, so the suspension reacts instantly to changes in load or road conditions.

4. Signs Yours Needs Replacement

• Rear Left Sagging: The rear left side sits lower than the rear right (check tire clearance above the wheel—there will be a visible gap difference).
• "Air Suspension Fault" Alert: Your touchscreen shows this warning, and the suspension may lock in "Safe Mode" (no height adjustments, limited speed).
• Unstable Ride: The rear left bounces over small bumps, or the vehicle leans heavily to the left during turns (the sensor isn’t sending accurate 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).
• Random Height Changes: The rear-left air spring inflates/deflates for no reason (the sensor is sending false data to the system).

5. Why It Beats Aftermarket Alternatives

• Tesla-Exact Programming: Calibrated with the exact height thresholds Tesla uses for Model S/X. No "false fault" alerts (a common issue with generic sensors that don’t match Tesla’s software).
• Perfect, Tool-Free Fit: Mounts to the rear-left suspension arm and sub-frame using factory holes—no drilling, grinding, or zip-ties. The 3-pin connector plugs directly into the original wiring harness (no wire cutting).
• Durable Build: The housing is made of glass-filled nylon (resists impact from road debris), and the connector has 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 long-term use (vs. generic sensors that drift quickly).

6. Installation & What You Get

• 1x Rear Left (Driver Side) Air Suspension Height Level Sensor (1027971-00-A)
• 2x Pre-lubricated OEM-spec mounting bolts (torque spec matches Tesla’s service manual requirements)
• Digital Installation Guide: Step-by-step photos, how to safely lift the rear of your Model S/X (without damaging the air suspension), and tips to avoid bending the sensor’s guide rod during installation.

7. After-Sales Support

• Warranty: Backed by a limited warranty. For details on coverage terms (e.g., duration, eligible issues), feel free to reach out.
• Technical Support: Our EV specialist team is available via email/chat to answer installation questions—we’ll help you get it right the first time.

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 established the independent brand "CheFuning". The Che Funing brand regards human resources as the foundation of the enterprise and attaches great importance to the construction of the talent team; The Che Funing brand regards product quality as the life of the enterprise, and every single product from screws to accident parts is carefully selected.

The CheFuning brand helps partners transform from traditional fuel vehicles to new energy vehicle models, expands from a single horizontal vulnerable parts operation to a new energy full vehicle parts channel enterprise, upgrades from regional chain stores to independent brands of new energy full vehicle series, standardizes the operation of independent brands in the new energy industry, and integrates resources to reduce costs and increase efficiency, occupying the commanding heights of enterprise management.