···
Log in / Register

What do MAX and REAR mean on a car?

4 Answers
MacAniyah
08/26/25 4:02am
MAX on a car means maximum. REAR means the rear or back part. These two terms usually appear on the car air conditioning or windshield. Here are detailed introductions about car air conditioning: Overview: The car air conditioning device (air-conditioning-device), referred to as car air conditioning, is used to adjust and control the temperature, humidity, air cleanliness, and air flow inside the car cabin to the optimal state. Function: Car air conditioning can provide a comfortable riding environment for the driver, reducing travel fatigue; it creates good working conditions for the driver, ensuring driving safety. The car air conditioning device usually includes a refrigeration device, heating device, and ventilation device.
Was this review help?
12
3
Share
McOlive
09/08/25 5:05am
When I first started learning to drive, I was completely clueless about the buttons in the car. The MAX label usually refers to the air conditioning's maximum cooling mode. Pressing it makes the fan operate at full power, blowing cold air directly at you, which is especially refreshing when driving in summer. REAR means functions related to the rear, like the REAR DEFROSTER, which is the rear window defrosting and heating button. Pressing it on foggy winter mornings clears the rear window. There's also the REAR WIPER for the rear windshield wiper, which helps remove rain and improve rearview mirror visibility on rainy days. I initially overlooked this feature when I first got the car, and almost rear-ended someone on a foggy morning. Now, I've developed the habit of checking these buttons before driving, making my drives much safer and more worry-free.
Was this review help?
8
4
Share
Expand All
CarterFitz
10/22/25 5:09am
After driving for a long time, you'll find these small features are thoughtfully designed. The MAX air conditioning is generally used in emergency situations on hot days to quickly cool down the cabin and protect your health. The REAR label on the dashboard, commonly seen as REAR DEFROSTER, activates electric heating wires to melt frost on the rear window, ensuring clear rear visibility and preventing accidents in blind spots. During rain, turning on the REAR WIPER (rear wiper) prevents the rear mirror from becoming blurry, which could affect lane changes. Every time I go on a long trip, I prioritize maintaining these components because aging REAR heating wires can be time-consuming and labor-intensive to repair. Remember to clean your windows regularly; although these buttons are small, they are crucial for driving safety.
Was this review help?
1
0
Share
Expand All
DakotaMarie
12/05/25 5:32am
When driving with my child, I pay special attention to in-car comfort. With just a press of the MAX AC button, it instantly blows cold air, quickly soothing my baby when they get fussy from the heat. Among the REAR functions, I use REAR DEFROSTER most frequently. On early mornings when driving my child to school, a single press clears the icy rear window for unobstructed visibility, ensuring safe driving without delays. On rainy days, activating the REAR WIPER instantly brightens the view with each swipe. After my husband taught me these details, I've become more meticulous in driving, especially during days with a child safety seat in the back. Utilizing MAX and REAR functions effectively ensures a stable in-car environment, keeping the whole family comfortable.
Was this review help?
14
2
Share
Expand All
More Forum Discussions

What is the wattage of the new Santana headlights?

The new Santana headlights are 75 watts. Lumen range of different material headlights: Generally, LED headlights produce 91 lumens per watt, so 35W would be 3200 lumens. Halogen headlights at 55W produce 1000 lumens, while xenon headlights at 35W produce 100 lumens. Lumen range of different headlights: High beams range from 35-60W with 3400-5900 lumens, low beams range from 35-55W with 3400-5400 lumens. Car headlights are generally 35W or 55W, with most using 35W, while a few 55W are installed on high beams.
9
2
Share

What is the reason for the non-rotation of Komatsu 56?

Komatsu 56's non-rotation may be due to a pilot pump failure. Fault inspection method: Use a pressure gauge to test at the pilot pump's pressure measurement port. If the pressure is between 35-45 kg, it is considered normal. Introduction to the pilot pump: A broken output shaft in the pilot pump can directly cause the excavator to have no movement at all, which shows how important the role of the pilot pump is. The excavator pilot pump pushes the main control valve block valve stem (distribution valve) through the pilot PPC valve (handle, foot pedal valve), directing the high-pressure oil output from the main pump to the designated working devices, such as the boom, arm, bucket, swing motor, and travel motor.
11
1
Share

What Causes the Metal Friction Sound from the Wheels?

Wheel metal friction sounds may be caused by the friction of the brake discs, indicating that the brake pads are worn too thin. It is recommended to visit an auto repair shop for replacement. This sound usually intensifies when braking and can be quite harsh. Considerations for selecting brake pads: Four key points: First, check the friction coefficient, which determines the basic braking torque of the brake pads. If it's too high, it can cause wheel lock-up, loss of control, and pad burning during braking; if too low, the braking distance becomes excessively long. Second, consider safety. Brake pads generate instant high temperatures during braking, especially during high-speed driving or emergency braking. At high temperatures, the friction coefficient of the pads decreases. Third, assess comfort, including braking feel, noise, dust, smoke, and odors, which directly reflect the friction performance. Fourth, evaluate lifespan. Typically, brake pads should last for about 30,000 kilometers. Two choices: First, always choose brake pads produced by reputable manufacturers. These should include a license number, specified friction coefficient, compliance standards, and the packaging should contain a certificate of conformity, production batch number, and production date. Second, opt for professional installation at a specialized repair point.
6
2
Share

What Causes Unstable Idle in BMW X5?

Unstable idle in BMW X5 is related to the throttle body and combustion chamber. Excessive carbon buildup in throttle body and mass air flow sensor: The throttle body and mass air flow sensor are prone to getting dirty. Most modern cars use electronic throttle bodies, and even a small amount of carbon buildup can affect them. Too much carbon in the throttle body can cause throttle sticking during acceleration, severe power loss, and unstable idle. A dirty mass air flow sensor leads to incorrect air flow signals. Since air intake determines fuel injection, this directly causes inaccurate fuel injection, resulting in increased fuel consumption and significant power loss. Therefore, changing the air filter is crucial, and don't forget to clean it every 30,000 kilometers. Excessive carbon buildup in combustion chamber and pistons: Too much carbon in the combustion chamber can absorb some gasoline, slightly prolonging the ignition time during startup. Additionally, excessive carbon buildup often forms on valves and piston rings, indirectly reducing cylinder pressure. This makes cold starts prone to unstable idle, while the issue improves when the engine is warm.
1
1
Share

Can You Shift Gears While Driving Straight?

During the straight-line driving section of the road test (Subject 3), you can shift gears, but you must ensure that the gear matches the vehicle speed. Below is relevant information about Subject 3 of the driving test: Introduction: Subject 3 includes the road driving skills test and the safety and civilized driving knowledge test. It is part of the motor vehicle driver's license assessment and is the abbreviation for the road driving skills and safety and civilized driving knowledge test in the motor vehicle driver's examination. The content of the road driving skills test varies depending on the type of vehicle being licensed. Specific test content for Subject 3: The road driving skills test generally includes: vehicle preparation, simulated lighting test, starting, straight-line driving, gear shifting operations, lane changing, pulling over, driving straight through intersections, turning left at intersections, turning right at intersections, crossing pedestrian crosswalks, passing school zones, passing bus stops, meeting vehicles, overtaking, making U-turns, and nighttime driving. The safety and civilized driving knowledge test generally includes: requirements for safe and civilized driving operations, safe driving knowledge under adverse weather and complex road conditions, emergency handling methods for situations such as tire blowouts, and post-accident handling knowledge.
3
3
Share

Can I take the Subject 4 exam without an ID card?

You cannot take the Subject 4 exam for a driver's license without an ID card. The exam requires verification of personal identity information for entry into systems such as the driver's license public security database, so an ID card is mandatory. If you don't have an ID card, you can first apply for a temporary ID card, which can be used to take the exam. The Subject 4 exam consists of 50 questions, presented in the form of case studies, images, animations, etc., with a full score of 100 and a passing score of 90. Subject 4, also known as the Subject 4 theory test or driver's theory test, is part of the motor vehicle driver's license assessment. After the implementation of the Ministry of Public Security's Order No. 123, the Subject 3 exam was divided into two parts: the road test and an additional safety and civility knowledge test, commonly referred to as "Subject 4," which evaluates "driving ethics." Since this test is conducted after Subject 3, it is commonly called the Subject 4 exam, although officially, there is no such term as Subject 4. If you fail the Subject 4 exam, you do not need to retake the previously passed exams (Subjects 1, 2, and 3). You can schedule a retake on your own, and no retake fee is required. There are no scheduling restrictions, but the validity period of the driving skills test permit is three years. If the applicant does not complete the exam within this period, the results of any previously passed subjects will become invalid.
5
1
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.