Browse

Property For Sale Property For Rent

Used Cars Others

Antiques Collectibles Apparel Baby Kids Items Books， Movies And Music Electronics Free Stuff Garden Outdoor Health Beauty Home Goods Home Improvement Supplies Musical Instruments Office Supplies Others Pet Supplies Sporting Goods Ticket Toys Games Transportation

Business Crafts Design And Web Events Home Improvement Legal Lessons Personal Pets Photography Repair And Technical Support Wellness Writing， Translation， And Transcription Others

Activities & Groups Artists & Musicians Classes & Lessons Events Friendship & Networking Lost & Found Rideshare Sports Teams Volunteers Travel & Travel Partners Skills & Language Swap Other

Why is the Audi A4 rearview mirror not heating up?

2 Answers

HaileyAnn

07/29/25 2:19pm

The reason why the Audi A4 rearview mirror is not heating up could be due to a blown fuse for the rearview mirror heating, a malfunction in the rearview mirror heating circuit, a faulty rearview mirror heating switch, or issues with the heated mirror glass. Function of heated rearview mirrors: When the button is pressed, the electric heating element behind the rearview mirror glass quickly heats up to a fixed temperature within a few minutes, typically between 35-60 degrees Celsius. Steam will emerge from both left and right rearview mirrors, and the water droplets on the mirror surface will gradually evaporate as the temperature rises, while the fog slowly disappears. This achieves the effect of heating the mirror, defogging, and defrosting. Precautions for using heated rearview mirrors: Each use should not exceed 30 minutes, otherwise it may affect the lifespan and clarity of the mirror.

Was this review help?

15

1

Share

Jodi

08/13/25 6:35am

Let me tell you, the Audi A4's mirror heating isn't working - I've seen this issue many times. The most common cause is a blown fuse. The fuse responsible for heating is located either in the interior fuse box or engine compartment - check the manual for its exact position. Another likely possibility is aging or damage to the heating element, especially in older vehicles where mirrors have endured years of weathering. Poor contact in wiring connectors is also frequent - these plugs can become loose or corroded over time. Switch or control module failures are less probable, but if there are error codes, it's best to scan with a diagnostic tool. Don't overlook the temperature sensor either - it only activates heating in low temperatures, and sensor failure can cause issues too. Such problems should be fixed promptly, as impaired visibility in rain poses serious risks. For DIY repairs, start by checking fuses before seeking professional help.

Was this review help?

11

4

Share

Expand All

More Forum Discussions

What does a dynamometer mean?

A dynamometer is a machine primarily used to test the horsepower of a car, commonly found in auto modification shops to measure the increase in horsepower of a modified car engine. Function of a dynamometer: The function of a dynamometer is to measure horsepower, which involves determining the output torque of the driving wheels and calculating the horsepower value, ultimately generating two curves: the torque output curve and the horsepower output curve. Unit: Horsepower is an old unit of measurement; the international unit kilowatt is now commonly used. As for whether higher power is always better, it is generally believed that under the same displacement, higher power is better. Some car manufacturers use advanced technologies, such as intake valve stroke control, EGR, 5-valve, etc., which inevitably increase power but also mean higher engine costs.

Can the Passenger Ride Shirtless?

No. It does not comply with civilized driving norms. Here are a few things that should not be done in the passenger seat: 1. Do not prop up your legs: When sitting in the passenger seat, avoid propping up your legs as it can block the driver's view in the right-side rearview mirror. 2. Do not smoke in the passenger seat: Smoking in the passenger seat should be avoided because the smoke can make the cabin air turbid, impairing the driver's visibility and creating safety hazards. 3. Do not engage in conversation with the driver: Sitting in the passenger seat, avoid talking to the driver as it can affect the driver's judgment and distract their attention.

What are the differences between the Alphard and Vellfire?

Alphard is a luxury MPV launched by Toyota in response to Nissan's Elgrand, based on an improved Previa chassis. Vellfire is a luxury MPV imported directly from Japan by FAW Toyota. The differences between Alphard and Vellfire are as follows in three aspects: 1. Exterior dimensions: (1) Alphard: The side profile appears more rounded, showcasing a streamlined design to the fullest. It features triangular front windows and parallelogram rear windows, with automatically sliding side doors as a highlight. (2) Vellfire: Split-type LED headlights and square inner lens split-type LED taillights create a cool and sharp look, presenting a more youthful and fashionable appearance. 2. Interior: (1) Alphard: Offers 7 seats, with the driver's seat featuring 8-way power adjustment and memory function. The second row is equipped with 4-way power-adjustable Ottoman first-class seats, featuring three-way headrests, independent armrests, cup holders, multifunctional folding tables, and a maximum seatback recline of 78 degrees. (2) Vellfire: The 4-way power-adjustable Ottoman front passenger seat provides higher comfort, with the Ottoman seat capable of transforming into a bed. 3. Powertrain: (1) Alphard: Comes with two powertrain options: a 2AZ-FE 2.4L inline-four engine producing 123kW max power and 227Nm max torque, paired with a 7-speed CVT; and a 2GR-FE 3.5L V6 engine delivering 202kW max power and 340Nm max torque, mated to a 6-speed automatic transmission. (2) Vellfire: Features a hybrid system based on a 2.5L engine, with a combined max output of 211 horsepower and 409Nm torque, matched with an E-CVT transmission and E-Four electric four-wheel drive.

What Do the Left and Right Feet Control When Driving?

When driving, the left foot controls the clutch, while the right foot controls the accelerator and brake. Below are the functions of these three components: Clutch: During vehicle operation, the driver can press or release the clutch pedal as needed to temporarily disconnect or gradually engage the engine with the transmission, thereby cutting off or transmitting the engine's power input to the gearbox. The clutch is a common component in mechanical transmissions, allowing the drivetrain to be separated or engaged at any time. Accelerator: The accelerator refers to the control device that regulates the engine's power (thrust). Brake: The brake, also known as the stopping mechanism, refers to the action of halting or reducing the speed of moving locomotives, vehicles, or other transportation tools and machinery. The braking system is a mechanical device designed to slow down the vehicle, also called a decelerator.

Do you need to turn on AC when using car air conditioning?

In winter, there is no need to turn on the AC when using the car air conditioning, but in summer, the AC should be turned on when using the car air conditioning. The AC button is the cooling switch of the car air conditioning. If the AC button is not pressed, the car air conditioning will not cool. Car air conditioning refers to the air conditioning device installed in the car, which can cool, heat, ventilate, and purify the air in the compartment, providing a comfortable riding environment for passengers, reducing the driver's fatigue, and improving driving safety. The cooling principle of the air conditioning is: 1. After pressing the AC button, the clutch of the air conditioning compressor can engage, and the engine will drive the compressor to run. When the compressor is running, it can continuously compress the refrigerant and deliver it to the evaporator. The refrigerant expands and absorbs heat in the evaporator. 2. The refrigerant can cool the evaporator, and the cooled evaporator can cool the air blown by the blower, so that the air conditioning vents can blow cold air. In winter, there is no need to turn on the AC because the car's heating is achieved by the heat generated by the car's own engine to produce warm air. The following introduces the normal method of turning on the heating in the car: 1. In winter, when the engine has just started, the temperature of the water tank is still very low. Turning on the air conditioning will not quickly increase the temperature inside the car but will increase the burden on the engine and delay the normal increase of the engine temperature. 2. After the car starts, it takes about 8-15 minutes for the water temperature to rise to the normal temperature. Generally, when the water temperature rises to about 70°C, the heating can be turned on. 3. Turning on the car heating does not require turning on the AC switch because it will start the compressor, which means turning on the cooling.

What is the reason for the car not moving after releasing the handbrake?

Releasing the handbrake but the car not moving can be caused by the following reasons: Brake system malfunction: If the brake is not fully released, the car won't move even when accelerating. Some vehicles require stepping on the brake pedal once to completely disengage the electronic handbrake. Transmission control unit failure: If the transmission fails to disengage from P (Park) mode, the vehicle won't move. If the car still doesn't move after shifting to D (Drive) gear, it might indicate an electronic control system malfunction. Transmission failure: If there's a malfunction in the transmission's internal drive system, the vehicle won't move. Carefully observe the dashboard warning lights to see if any brake, transmission, engine, or other warning lights are illuminated. If present, consult a mechanic to determine if they're related to the vehicle's inability to move.

Trending Ranking

How Long Is the Warranty Period for a New Car?

Can You Place a Teddy Bear in the Front Passenger Seat?

Is it necessary to go to a 4S shop for maintenance?

Do You Need to Turn on AC for Defogging in Winter?

What Causes Yellow Spots on the Interior Roof Lining of a New Car?

How Many Chips Does a Car Need?

What Causes the Steering Wheel to Not Return to Center Properly?

What is the maximum speed of the Wuling Hongguang S?

Are All New Vehicles Exempt from Inspection for 6 Years?

What is the purpose of the blue and red lines on new tires?

More Forum Discussions

Can a manual pump inflate car tires?

Will Points Be Deducted for the Front Passenger Playing with Their Phone?

What is the name of China's first Mars rover?

Will Boiling Over Once Damage the Engine?

Help

Cookie

Cookie Settings

© 2025 Servanan International Pte. Ltd.