MA12-66-920

Brand: Haima

Model: S7

Product Name：Radar Sensor

Part Number: MA12-66-920

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Product Details

Haima S7 Radar Sensor – Part No.: MA12-66-920

Let’s keep it simple—this isn’t just a “small box on your car’s bumper.” It’s the key safety helper for parking and low-speed collision avoidance in the Haima S7: a compact, durable unit made of waterproof, dustproof ABS plastic (stands up to rain, snow, and road grime) and an internal ultrasonic/millimeter-wave detector (depending on the S7 variant) that sends out and receives signals. Mounted on the Haima S7’s front/rear bumper (usually in pre-drilled slots, 2–4 sensors per bumper), it acts as the car’s “close-range eyes.” Without it, you’d struggle to judge distances to curbs, walls, or small objects (like bike wheels) when parking—often leading to minor bumper scrapes.

This radar sensor is exclusive to Haima S7—always check your vehicle’s VIN to confirm fitment! It’s tailored to the S7’s specs: its detection range (usually 0.3–2 meters) matches the S7’s bumper length (so it covers blind spots near the car), its signal frequency works with the S7’s on-board computer (no false alerts), and its size fits the bumper’s pre-cut holes (no modification needed). Grab a generic sensor or one for other models? You’ll run into troubl e: wrong detection range (misses obstacles or gives false warnings), incompatible signals (won’t connect to the S7’s computer), or bad fit  (falls out of the bumper).

 Core Jobs: Detect Obstacles, Help Park, & Avoid Low-Speed Hits

As a must-have for the S7’s driver assistance system, it does three key jobs to make parking and slow driving safer:

Detect close-range obstacles: When you’re parking or moving slowly (under 10 km/h), the sensor sends out invisible signals. If the signals hit something (like a curb, another car, or a shopping cart), they bounce back to the sensor. The S7’s computer then calculates the distance to the obstacle.

Warn you with sounds/lights: When the obstacle gets too close (usually under 50 cm), the sensor triggers a beep inside the cabin (faster beeps = closer obstacle) or a light on the dashboard. This lets you stop in time—no need to crane your neck to see tight spots.

Support low-speed collision avoidance (some variants): If the S7 has automatic emergency braking (AEB) for low speeds, this sensor works with other systems to trigger the brakes gently if you’re about to hit something (like a parked car) and don’t react in time.

This MA12-66-920 radar sensor only fits Haima S7—wrong fit means useless parking assistance:

Fits These: All Haima S7 variants (matches the bumper’s mounting slots, signal frequency, and computer compatibility—confirm with VIN).

Won’t Fit These:

Other Haima models: Like Haima S5, 7X, or M3—different bumper designs, computer systems, and detection range needs (sensor can’t connect or fit).

Non-Haima vehicles: Even if it looks similar, their on-board computers and bumper sizes differ (no functional fit; may damage the car’s electrical system).

S7 with modified bumpers: Aftermarket bumpers (e.g., sporty or off-road ones) lack the pre-drilled slots—original sensor can’t be installed (or needs cutting the bumper, which ruins its look).

Installation & Upkeep (Pros Need to Calibrate!)

Installation: Must Be Done by Certified Technicians

Replacing this sensor isn’t just plugging it in—calibration is key for accuracy:

Prep: Techs remove the S7’s front/rear bumper (or a small section) to access the old sensor’s wiring, disconnect the old unit, and remove its mounting clip.

Install new sensor: They snap MA12-66-920 into the bumper’s slot (using the mounting clip), plug in the wiring connector, and reattach the bumper.

Calibrate: They use Haima’s special tool to sync the sensor with the S7’s computer—this sets the correct detection range and eliminates false alerts. They test it by moving a small object near the bumper to confirm the beep works.

Maintenance: Super Easy to Keep It Working

Clean the sensor surface weekly: Wipe the sensor with a soft, damp cloth to remove dirt, mud, or bug splatters—dirty sensors send weak signals (may miss obstacles).

Check for damage after bumper hits: If you bump the bumper (even lightly), check the sensor for cracks—broken housing lets water in (kills the sensor).

Avoid painting over the sensor: If you repaint the bumper, don’t paint the sensor’s front—paint blocks signals (sensor won’t detect anything).

Test it monthly: Turn on the S7’s parking assist mode, slowly drive toward a curb, and listen for the beep—if there’s no sound, have the sensor checked (may need re-calibration).

Summary: Haima S7 Radar Sensor (MA12-66-920)

Exclusive to Haima S7 (confirm VIN for fitment), this sensor is a compact, durable unit—made of waterproof/dustproof ABS plastic with an ultrasonic/millimeter-wave detector. Mounted on the S7’s front/rear bumper (2–4 per bumper), it acts as "close-range eyes" for parking.

Key roles: Detect obstacles (0.3–2m range) when parking/slow driving (<10km/h); trigger beeps/lights (faster beeps = closer obstacle) for warnings; support low-speed AEB (some variants) to avoid hits.

It fits all S7 variants but not other Haima models (e.g., S5, 7X), non-Haima vehicles, or S7 with modified bumpers.

Professional installation (with calibration via Haima tools) is needed. Maintenance: Wipe weekly, check after bumper hits, avoid painting the front, test monthly. Original parts ensure accurate detection, stable signals, and compatibility.

MA12-66-920