Xiaomi 70 Mai TPMS (Tire Pressure Monitor Sensor) Operating Manual. Tire Pressure Monitoring System

70 Mai TPMS (Tire Pressure Monitor Sensor) Tire Pressure Monitoring System User Manual

Thank you for purchasing the 70 Mai Tire Pressure Monitoring System!

Before using the device, please carefully read the manual and keep it for future reference. By Xiaomi.

Xiaomi 70 Mai Tire Pressure Monitor

The smart tire pressure sensor allows you to monitor tire pressure in real time without leaving the car. The device is easy to use and does not require special knowledge or professional equipment for installation. The Xiaomi 70 Mai Tire Pressure Monitor is suitable for cars of any brand.

This product wirelessly transmits real-time tire pressure and temperature data to an external receiver. On the receiver’s screen, after processing, information on tire pressure and air temperature is displayed. Based on user settings, the system issues alerts if measured parameters exceed acceptable levels.

The driver can also connect the system to a smartphone via Bluetooth and receive data wirelessly. When the car starts moving, the system detects vibration and automatically exits sleep mode.

The 70 Mai TPMS wheel sensors are lightweight, and the internal design prevents theft. The in-car receiver is equipped with solar panels for battery charging. The system alerts the driver if air leakage begins in any tire, improving vehicle safety.

Appearance

Package contents

The Xiaomi 70 Mai system includes four tire sensors and a main receiver with a display, which is placed on the car’s dashboard and allows the user to monitor tire pressure and temperature for all four wheels.

1. Signal receiver.
2. 4 wheel sensors.
3. USB – MicroUSB power cable.
4. User manual.
5. 4 tire pressure warning stickers.

Features

• High measurement accuracy – 0.1 atm
• Monitors both pressure and temperature
• Easily detects even minor punctures
• The app allows complete tire condition statistics
• Power supplied via solar panel

Precautions

1. This product can monitor tire pressure and temperature, but it cannot prevent tire punctures or guarantee accident avoidance. It is important to use high-quality tires. When the receiver issues a warning, stop the car in a safe place and check the tires. If necessary, take the car to a service station.

2. Installation and use of the 70 Mai TPMS cannot replace regular car maintenance and inspection. Car owners are responsible for vehicle safety.

3. The receiver must be installed correctly and must not obstruct the driver’s view. It should be securely fixed to avoid movement while driving. It must not interfere with vehicle controls or other instruments.

4. Do not operate the 70 Mai TPMS while driving. Lack of attention to the road may cause accidents. The driver is responsible for related risks.

5. The 70 Mai TPMS can monitor tires and issue alerts automatically, without driver intervention. The driver must remain focused on the road.

6. Due to thermal expansion and contraction, tire pressure and temperature may increase or decrease during driving. This is normal.

7. Air leakage from tires occurs naturally over time, causing gradual pressure loss. This is normal and not caused by the 70 Mai TPMS.

8. Installation may affect system performance or damage it. Install the 70 Mai TPMS at a service station or with professional help. Take care not to damage sensors during tire removal and installation. Valve sensors are not designed for frequent removal/reinstallation.

9. If unused for a long time, the receiver battery may discharge. In this case, recharge it via USB before using the system.

10. Strong impacts or vibrations may damage the 70 Mai TPMS and affect normal operation.

11. Do not use chemical solvents or detergents to clean the 70 Mai TPMS.

12. The car manufacturer specifies reference tire pressure values. Since weight distribution and tire characteristics differ for each model, recommended front/rear tire pressure, as well as no-load/loaded values, may differ. This information can be found on the driver-side door (near pillar B), inside the fuel tank lid, or in the car manual.

13. Sometimes the receiver may not display data or show it with a delay. This is due to the data transmission method. To extend battery life, sensors do not transmit continuously but only when the car reaches a certain speed or when there is a significant change in pressure or temperature.

14. When the receiver beeps, stop the car safely on the roadside and check the tires as soon as possible.

15. Pressure and temperature values for the four tires displayed on the receiver may vary slightly. This is normal and due to tire wear differences.

70 Mai TPMS Appearance and Controls

1. Receiver

Power button	Micro USB charging port
Device info sticker and S/N	Solar panel

2. Built-in wheel sensor

Cap	Locking nut	Seal	Pressure sensor

70 Mai TPMS Tire Pressure Monitoring System Installation

Sensor installation

1. Dismount the four tires one by one and remove the original valve. When removing the tires, note their original position so they can be reinstalled correctly. After removing the original valve, clean the valve hole in the wheel hub with a cleaning solution.

2. Remove the dust caps and locking nuts from the sensor.

3. Install the sensors into the valve holes on the wheel hubs according to the sensor numbers. (Ensure that the electronic module of the sensor is parallel to the wheel hub for stable operation and accuracy). Secure the sensors with locking nuts.

Important note:

The locking nut tightening torque should be 3–5 N·m.

4. Mount the tires back on the wheel hubs and inflate them to the standard pressure.

Attention:

Please turn on the receiver before continuing installation. During tire inflation, the receiver will receive data from the sensor showing tire temperature and pressure. If the pressure/temperature data does not appear on the receiver, do not mount the tires. Contact service support for troubleshooting.

5. Check the tire valve for air leaks (if leaking, adjust the valve angle or clean the wheel rim valve hole).

6. After installation, balance the wheels.

7. Reinstall the wheels on the car in their corresponding positions.

8. Attach the tire pressure warning stickers so that they face the valve of the wheel rim.

Receiver installation

Peel off the protective film from the double-sided tape on the bottom of the receiver and fix the receiver in the driver’s line of sight. The receiver must not obstruct visibility or vehicle controls.

70 Mai TPMS Operating Instructions

Receiver interface

	1: Solar charging indicator.
	2: Battery status.
	3: Current tire pressure value.
	4: Current tire temperature values.
	5: Tire pressure/temperature warning indicator.
	6: Current Bluetooth connection status.

1. Before use

Power on

After installing the TPMS receiver, press and hold the power button or connect the USB cable to power it on. When powered on, the receiver will beep and begin displaying tire pressure and temperature. Initially, the display may show “-”, which is normal. Tire pressure and temperature values will appear within 3–5 minutes of driving. Alternatively, you can power on the receiver during sensor installation in a garage, and the tire temperature will be displayed during setup.

2. Alarm function

1. Air leakage alarm

If tire pressure drops by 0.2 bar or more in one data transmission cycle, the receiver activates a buzzer, and the corresponding tire’s pressure value flashes on the display.

Briefly press the power button to mute the buzzer, or it will turn off automatically once the tire pressure stabilizes.

2. High pressure alarm

If tire pressure in any tire exceeds the standard cold tire pressure by 25% (125% of normal) in one data cycle, the receiver will sound a buzzer, and the pressure value for that tire will flash.

You can mute the alarm by pressing the power button, or it will stop automatically once the pressure drops 0.1 bar below the warning threshold. (Default high pressure alarm threshold: 3.0 bar)

Tire pressure alarm settings should be adjusted for different car models according to the vehicle manual or after consulting a service center.

3. Low pressure alarm

If tire pressure in any tire falls 25% (75% of normal) below the standard cold tire pressure in one data cycle, the receiver will sound a buzzer, and the pressure value for that tire will flash.

You can mute the alarm by pressing the power button, or it will stop automatically once the pressure rises 0.1 bar above the warning threshold. (Default low pressure alarm threshold: 1.8 bar)

Tire pressure alarm settings should be adjusted for different car models according to the vehicle manual or after consulting a service center.

4. High temperature alarm

If the tire temperature exceeds the threshold during a data cycle, the receiver will sound a buzzer, and the temperature value for that tire will flash.

You can mute the alarm by pressing the power button, or it will stop automatically once the tire temperature drops 1°C below the threshold. (Default high temperature alarm threshold: 70°C)

5. Low battery alarm

When receiver battery charge drops below 20%, the battery icon begins to flash.

Sleep mode and power off

The receiver enters sleep mode when no vibration is detected and no sensor data is received for 5 minutes. It will wake again when vibration occurs or when connected to USB. When powered without USB connection, the receiver can be turned off by pressing and holding the power button. When powered via USB, pressing and holding the power button puts the receiver into sleep mode.

70mai Mobile App (APP) for Android

Installing the 70mai mobile app and pairing with 70 Mai TPMS via Bluetooth

Download and install the 70mai App on your smartphone. This app can also display tire pressure, wheel temperature, and perform other operations.

Adding a device

1. Open the 70mai App, tap to enter the personal center, and select Add Device to display the device list.
2. Find 70mai Tire Pressure Monitoring System and tap this item in the list to add the device.
3. Follow the on-screen instructions. Enable Bluetooth on your smartphone and search for the TPMS system to pair with your phone. Note: the TPMS device name will appear as “70mai_t01_xxxx,” where “xxxx” are the last four digits of the receiver’s Bluetooth address. These last four digits can be found on the product packaging.
4. Follow the on-screen instructions to complete authorization.

Main functions of the 70mai app

• Check tire temperature;

• Set standard tire pressure;

• Wheel temperature report;

• Sensor binding;

• Receiver and sensor firmware updates;

• View tire condition information;

Main page

The main page displays the pressure and temperature of each tire.

Settings

Tap the "•••" icon in the top right corner of the main page to enter settings.

Tire pressure settings

You can set standard pressure for the front and rear tires depending on your car model.

Tire temperature settings

You can set high-temperature alarm values for the front and rear tires depending on the car model.

Sensor pairing

If a sensor is installed on the wrong tire, tap Reconfigure to reset the sensors.

When replacing a sensor, first install it on the tire and then perform pairing. Follow on-screen instructions to complete sensor pairing.

Frequently Asked Questions (FAQ)

1. Can users install the 70mai TPMS system themselvesx Is dynamic balancing requiredx

The 70mai TPMS is an embedded monitoring system that users cannot install by themselves. Installation must be done at a service station. Since each sensor weighs 20 g, dynamic wheel balancing is required.

2. What is the service life of the 70mai TPMS sensor batteryx Can users replace the batteryx

The battery life is 8–10 years (based on 2 hours of driving per day). Users cannot replace the built-in sensor battery. It is recommended to replace the entire sensor.

3. Can 70mai TPMS sensors be replaced individuallyx

Yes. After replacing a sensor, bind it with the receiver using the app to ensure proper operation.

4. Is the display clearly visible under strong direct sunlightx

The 70mai TPMS display is an industrial-grade LCD with a wide operating temperature range. It works normally between -20°C and 80°C. With high contrast and wide viewing angles, the screen ensures clear readings even under strong sunlight.

5. Is the 70mai TPMS system easily damagedx

The 70mai TPMS uses automotive-grade sensors that have been tested in harsh conditions to ensure they are very durable under normal use.

6. Can the 70mai TPMS receiver drain the car batteryx Is it necessary to turn off the system after the engine is offx

No, the 70mai TPMS is powered by a car charger and solar panel. In most vehicles, the cigarette lighter power turns off when the engine is off. In addition, the receiver enters sleep mode when the engine is off, so the car battery will not drain. Users may still disconnect the charger if desired.

7. Does sensor placement (front left, rear left, front right, rear right) matterx

Each TPMS sensor has a unique ID number. By default, sensors are pre-bound to the receiver. For correct data display, sensors must be installed in their designated positions.

8. How to connect the 70mai TPMS system to a smartphonex

Download the 70mai app. Ensure both the receiver and smartphone Bluetooth are on. Open the app and follow the on-screen instructions to connect.

9. If a sensor is installed on the wrong tire, should it be removed and reinstalledx

No, simply use the sensor binding function in the app to reconfigure the sensors.

10. Can the 70mai TPMS pressure and temperature warning thresholds be changedx

Yes. Default thresholds are preset for various car models, so users do not need to set them manually. If your car model is not listed or you want to change thresholds, you can do so via the app.

11. Does the 70mai TPMS monitor tires when the car is stationaryx

Yes. The system activates when pressure changes. If tire pressure changes by more than 10 kPa (0.01 bar), the sensors activate. However, the receiver must be on to receive data and trigger alerts.

12. Will there be signal loss when using 70mai TPMS while drivingx

No, the system uses automotive-grade sensors tested at high speeds to ensure no signal loss, even at speeds up to 200 km/h.

13. Why doesn’t the display turn on after installationx

It is recommended to connect the receiver to the car’s cigarette lighter and let it charge for a while before turning it on for the first time.

14. Why does tire pressure change significantly while drivingx

Generally, tire pressure and temperature are lower when stationary than while driving. After some time driving, tire temperature rises, and pressure increases by 0.1–0.3 bar. This is normal.

15. Why does the receiver display “—”x

The sensors may still be in sleep mode. Check the display again after the car has been driven for some time.

16. Sometimes the system shows a warning, but no leak is found. Whyx

It may be that tire pressure was previously higher, but after a minor leak it remains within normal range. Check for foreign objects stuck in the tire.

17. How should the 70mai TPMS be installedx

The system requires tire removal for installation. Installation must be performed at a service station.

18. How to determine correct tire pressurex

Car manufacturers specify reference tire pressures. Since weight distribution and tire specs differ for each model, recommended front/rear and loaded/unloaded pressures vary. This info can be found on the driver-side door (near pillar B), inside the fuel tank lid, or in the car manual.

19. Recommended tire pressure

Due to expansion/contraction in different weather, tire pressure should be increased by 0.1–0.2 bar above standard in winter and reduced by 0.1–0.2 bar in summer.

20. What happens if tire pressure is incorrectx

Low pressure: tires may be damaged or punctured at high speeds; wheel hubs may also be at risk.
High pressure: tires may cause vibration, reduced road grip, higher risk of damage, and puncture.

21. Why does the receiver sometimes receive data and sometimes notx

Check for interference sources, sensor transmitter damage, or low sensor battery.

22. What if the battery does not last longx

The system uses a high-resolution color display that consumes more power. If solar charging is insufficient, connect the receiver to power via USB cable.

70 Mai TPMS Technical Specifications

Main sensor parameters

Receiver parameters

Name and content of hazardous substances in the product

INSTALLATION IN CHINA SERVICE:

Contact a specialist to install the 70 Mai TPMS. To install the system in China, please scan the QR code below to fill in the required information and pay the installation fee.

For all service inquiries, contact 70mai support:
Website: www.70mai.com
24/7 hotline: 400-045-2399
Manufacturer: Shanghai Digital Technology Co., Ltd.
Address: Minhang District, Shanghai, Zixing Road, No. 588, Room 2220, Building 58832

Warranty (PRC):

After-sales service of the 70mai TPMS tire pressure monitor strictly follows the Consumer Rights Protection Law of the PRC and the Product Quality Law of the PRC. The service content includes:

1. Warranty period
• Within 7 days of purchase, if the product is defective as confirmed by a service center, you may return or exchange it free of charge.
• Within 55 days of purchase, if the product is listed in the “Product Performance Fault Table” due to performance issues, it will be tested and confirmed, and you may have it replaced or repaired free of charge.
• Within 12 months of purchase, if the product has a defect confirmed by an after-sales service center, it can be repaired free of charge.

* The above service conditions apply ONLY in China.

2. Non-warranty cases:
• No purchase receipt.
• Product has mechanical damage.
• Product damaged by natural factors such as fire, flood, or lightning.
• Product model and code on the warranty card do not match the actual product.
• Normal wear and other changes during use.
• Other faults or damages.

3. Product performance fault table