What is the name of the semi-circular black plastic above the tire?

Why are used Chevrolet Epicas so cheap?

With the development of the automotive industry, more and more people are buying cars, and the prices of new cars are becoming increasingly affordable, which also makes used cars more economical. Here is some information about used cars: 1. Introduction: A used car refers to a motor vehicle that has been registered with the public security traffic management authorities, has not yet reached the national scrapping standards or is still within its economic service life, and can continue to be used. 2. Considerations: When purchasing a used car, you should carefully examine the manufacturing date, actual mileage, whether the car has been involved in any major accidents, and whether the previous owner maintained the vehicle properly, among other factors.

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Should the Peugeot 408 use 92 or 95 octane gasoline?

According to the official vehicle manual recommendation, the Peugeot 408 should use 92 octane gasoline. In addition to checking the suitable gasoline grade in the vehicle manual, the Peugeot 408 can also check it on the fuel tank cap, which will also be marked. Usually, the gasoline grade can also be determined based on the engine's compression ratio. Vehicles with an engine compression ratio between 8.6-9.9 should choose 92 octane gasoline, while those with a compression ratio between 10.0-11.5 should choose 95 octane gasoline. However, with the use of some new technologies, the gasoline grade cannot be determined solely by the compression ratio. A high compression ratio can also be tuned to use low-grade gasoline. This is because, in addition to the compression ratio, other factors such as ignition timing, turbocharging technology, and Atkinson cycle technology also play a role. Generally, the higher the gasoline grade, the higher the octane number and the better the anti-knock performance. 92 octane gasoline contains 92% isooctane and 8% n-heptane, while 95 octane gasoline contains 95% isooctane and 5% n-heptane. If the Peugeot 408 occasionally uses the wrong gasoline grade, simply switch back to the correct grade after use. However, long-term use of the wrong gasoline grade may have the following effects: For vehicles recommended to use low-grade gasoline, using high-grade gasoline by mistake will not cause damage, but the increase in octane number will change the fuel's ignition point, leading to delayed combustion in the engine. This means both the engine's power output and thermal efficiency will decrease, resulting in poorer performance. For vehicles recommended to use high-grade gasoline, using low-grade gasoline may cause engine knocking. Because the octane number is too low, the gasoline's ignition point decreases and may ignite prematurely during the compression stroke. If the fuel ignites before the spark plug fires during the compression stroke, resistance will occur during the upward stroke. This resistance will make the engine run very unstably. If it is mild knocking, it only increases noise and does not significantly damage the engine. However, if there is obvious knocking, it indicates severe engine conditions. The vibration not only affects driving stability but also causes abnormal wear on the pistons and cylinders, and in severe cases, may even lead to cylinder scoring.

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What Causes the ABS Light to Illuminate and the Steering Wheel to Lock?

There are multiple scenarios where the ABS light may illuminate, with different causes and solutions for each condition, as detailed below: Condition 1: ABS warning light remains constantly lit (most common). Cause 1: The ABS wheel speed sensor's sensing area is contaminated by mud, dirt, or other pollutants, interfering with its ability to detect wheel speed signals. This prevents the ABS control module from determining vehicle speed or calculating wheel slip rates, thus disabling proper brake modulation. Solution: Clean debris from wheel speed sensors and adjust the gap between sensors and tone rings to restore normal function. Cause 2: Loose wiring connections or poor contact in ABS relays causing signal disruptions. Solution: Inspect wiring connections and resecure any loose terminals. Condition 2: ABS warning light intermittently illuminates but extinguishes during acceleration. Cause: Electrical system voltage drops below 10.5V when multiple accessories are in use. The light extinguishes as engine RPM increases voltage. Possible low voltage supply to ABS system due to poor connections or grounding issues. Solution: Check battery specific gravity; inspect charging system; verify power supply connections (e.g. voltage relays or loose power contacts). Condition 3: ABS light remains illuminated after engine start until ignition OFF. Cause: Poor ground connection at ABS hydraulic valve body; faulty wiring harness connectors; ABS control module malfunction. Solution: Loosen and retighten hydraulic valve body ground screws, cleaning contact surfaces if necessary; inspect connector gaps; replace ABS or ABS/ASR control module if needed. Condition 4: ABS warning light activates during highway driving. Cause: ABS module detects excessive speed differential between front and rear wheels; incorrect tire or wheel rim specifications. Solution: Verify proper tire and wheel rim specifications as indicated on vehicle placards (typically near fuel filler). Condition 5: Intermittent ABS warning light activation. Cause: Maladjusted brake light switch; internal contact failure in brake lights. Solution: With engine running, depress brake pedal and manually push switch lever downward to reset position; replace faulty brake light switch. When the ABS warning light is illuminated, continued driving is not recommended. An active ABS fault indicates compromised anti-lock braking functionality. During emergency braking, wheel lock-up could cause loss of vehicle control and directional stability, creating significant safety hazards.

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How to View the Dashcam in Audi Q5L?

The Audi Q5L does not come with a built-in dashcam. Below is an introduction to dashcams: 1. A dashcam is a device that records images, sounds, and other related information during vehicle travel. After installing a dashcam, it can record the entire driving process in video and audio, providing evidence in case of traffic accidents. 2. The most basic dashcam has five buttons with different functions. Before use, first insert a memory card. Press and hold the power button to turn it on or off. The mode button can switch between recording, photo-taking, or preview modes. Selecting the recording mode will automatically start recording; press the confirm button to pause. In photo mode, press the confirm button to take a photo. In preview mode, use the up and down buttons to select video or photo files, press the OK button to play or pause, and press the mode button to exit. 3. The most basic dashcams have a resolution of at least 2 megapixels. If the dashcam you choose has a resolution below 2 megapixels, the recorded images may be unclear. Even if it captures traffic situations, unclear images can make identification difficult. Therefore, when purchasing, pay attention to the resolution and choose a device with high resolution, clear imaging, and high definition.

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Is it okay not to change the transmission oil for 8 years?

It is not advisable to go without changing the transmission oil for 8 years. If left unchanged for such a long period, the transmission oil is highly likely to deteriorate due to contamination in the transmission, leading to poor lubrication and causing gear burning or deformation in the transmission. For automatic transmissions, it can also affect the engine's power transmission. Currently, there are two main types of transmissions in vehicles: manual transmissions and automatic transmissions. Manual transmissions use gear oil, which primarily provides good lubrication for the gears and cleans the metal debris generated from gear wear to ensure the transmission operates healthily and stably. Automatic transmissions use specialized automatic transmission fluid (ATF), which not only serves the purposes of lubrication and cleaning but also transmits the engine's power within the torque converter. Whether it's gear oil for manual transmissions or ATF for automatic transmissions, it is recommended to change them every 40,000 kilometers. There are two methods for changing transmission oil: the gravity method and the circulation machine method. The traditional gravity method for changing automatic transmission oil can only replace about half of the used oil. The method involves removing the drain plug, allowing the transmission oil to flow out naturally due to gravity, and then adding new oil through the fill port. The circulation machine method achieves a fully intelligent, equal-volume oil change. When the vehicle is started, the transmission oil is changed while circulating inside the transmission, which can remove contaminants from the transmission, achieving an oil change rate of over 90%.

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How Many Driving Test (Subject Two) Sessions Are There in a Month?

There are two scheduled driving test (Subject Two) sessions per month. Tests are conducted daily except on weekends and holidays, although the exact scheduling times vary among different driving schools. Candidates are given five opportunities for "official tests" and "retests" (totaling ten chances). This means each test attempt includes one official test and one retest opportunity. Failing both requires rescheduling (up to five times total). The Subject Two test consists of five mandatory components: reverse parking into a garage, parallel parking, hill start and stop, 90-degree turn, and S-curve driving. Scoring is out of 100 points, with deductions of 20, 10, or 5 points for errors. A minimum score of 80 is required to pass. Key techniques for Subject Two: Slow speed: Maintaining slow vehicle speed is fundamental. Operate as slowly as possible without stalling to allow ample time for adjustments during each maneuver. Adjust mirrors: Properly adjusting rearview mirrors before starting is crucial, especially for reverse parking and parallel parking. Three-point alignment method: Align the driver's eyes, a vehicle reference point, and a ground reference point. Precise spotting and observation are essential for accurate positioning. Monitor vehicle corners: The front corner may cross outer lines during reverse parking; rear corners may touch garage side lines. Front corners risk crossing lines during S-curves and 90-degree turns. During parallel parking, the front left corner may touch outer lines or garage corners, while the right rear corner may contact garage lines. Always monitor all four corners relative to boundary lines.

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What is the name of the semi-circular black plastic above the tire?

Why are used Chevrolet Epicas so cheap?

Should the Peugeot 408 use 92 or 95 octane gasoline?

What Causes the ABS Light to Illuminate and the Steering Wheel to Lock?

How to View the Dashcam in Audi Q5L?

Is it okay not to change the transmission oil for 8 years?

How Many Driving Test (Subject Two) Sessions Are There in a Month?

What Causes No Airflow from the Rear Air Conditioning in a Car?

How to Open the Rear Air Vents in the Wildlander?

What is the slope range for accessible ramps?

Why Replace Spark Plugs?