Browse

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 Pet Supplies Sporting Goods Ticket Toys Games Transportation Others

Used Cars New Cars Others

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

What are the reasons why the BMW 523 suddenly cannot start?

1 Answers

ElizaRose

07/30/25 10:34am

Reasons why the BMW 523 suddenly cannot start: 1. Car battery: The battery is the basic power source for starting the car. The battery is mainly responsible for operating the starter motor. If the battery is low on power, it cannot make the starter motor operate, and the starter motor cannot drive the flywheel to make the engine turn, so naturally the car cannot start. When starting, there may be no sound or a clicking noise, and it will feel noticeably weak. In this case, first consider the battery as the cause. 2. Car starter motor: The starter motor is responsible for driving the engine. When the ignition switch is turned, power is sent to the starter motor, which then operates to drive the engine and make it run. If there is power at this time and the battery has sufficient power, but the starter motor does not operate, then consider whether the starter motor's carbon brushes are worn or the starter motor's solenoid is burnt out. 3. Car ignition system and fuel supply system: Generally, it is caused by wiring faults or a burnt ignition relay, leading to no ignition and failure to start. The sound during startup is the same as usual, but the car just won't start. In this case, check if there is no fuel supply. No fuel supply could also be due to wiring issues, a burnt fuel pump relay, or a blown fuse. If there is power to the fuel pump but no fuel in the fuel line, then consider whether the fuel pump motor is damaged, leading to no fuel supply and affecting normal startup.

Was this review help?

6

3

Share

More Forum Discussions

What are the three wires of the Audi fuel level sensor?

Audi fuel level sensor's three wires are the fuel level signal wire, fuel gauge ground wire, and low fuel level signal wire. Below are the detailed introductions of the three wires of the fuel level sensor: 1. Fuel level sensing wire: The voltage of this wire changes with the fuel level in the tank. 2. Fuel gauge ground wire: This ground wire is different from other grounding wires. It is a ground wire connected from the dashboard to the fuel tank sensor for accurate measurement of the fuel level in the tank. The resistance value between this wire and the vehicle frame is 0 or approximately 0 (Note: Use the 200 ohm range on a multimeter for measurement). 3. Low fuel sensing wire: When the fuel level is below the minimum point (warning point), the sensor switch closes, connecting this wire to the fuel gauge ground wire. The low fuel warning light on the dashboard will be illuminated. When the fuel level is above the minimum point (warning point), the low fuel warning light turns off.

What are the reasons for the Mazda 6 air conditioning not cooling?

Here are the specific reasons why the Mazda 6 air conditioning is not cooling: 1. Lack of refrigerant: If the air conditioning lacks refrigerant, as long as the vehicle has not been involved in a serious rear-end collision or had its air conditioning pipeline and other components disassembled, which would affect the sealing, the refrigerant will not be consumed. 2. Dirty condenser: The radiator and condenser are important heat dissipation devices in the vehicle. If they are too dirty, it will lead to poor heat dissipation, which not only causes the engine to overheat but also directly affects the cooling performance of the air conditioning. Therefore, if the air conditioning performance is unsatisfactory during hot weather, consider whether the vehicle's heat dissipation system needs cleaning. 3. Aging or loose compressor belt: Generally, the 4S shop will remind you to replace the compressor belt during maintenance. If not replaced on time, slipping may occur during use, leading to belt breakage, belt noise, or loss of power assistance.

Can a new car be sold to someone else before it is licensed?

Yes. As long as the new car has not been licensed, there is no vehicle license, and no transfer of ownership is involved. For a newly purchased car, if you want to transfer it to someone else before licensing, the feasible method is to negotiate with the dealer to cancel the issued sales invoice and issue a new invoice with the transferee's name as the recipient. This way, the transferee can directly register the vehicle under their own name at the vehicle management office. Below is relevant information about vehicle ownership transfer: 1. Required materials: For vehicle transfer, both parties need to provide copies of their ID cards, the registration certificate, and the vehicle license. Then, they must pay the transaction tax at the used car exchange and complete the transfer procedures at the vehicle management department of the traffic police brigade. 2. Related documents: Vehicle transfer requires documents such as the seller's ID card, vehicle license, vehicle registration certificate, vehicle invoice, license plate, chassis number, insurance policy, and tax payment certificate. Note that all materials should be prepared at once to avoid repeated revisions.

Does the Enclave Need an Underbody Guard?

For urban road driving, installation is not necessary as city roads are generally smooth, and installing an engine guard may impair engine cooling. However, if the vehicle frequently travels on rough or mountainous roads, installation is recommended. Functions of an underbody guard: Keeps the engine compartment clean, preventing road water and dust from entering. Protects the engine from being struck by gravel or hard objects kicked up by tires during driving, as such impacts can damage the engine. Materials for engine guards: Steel plate: Durable and inexpensive, but heavy, which can increase fuel consumption and may interfere with engine drop in collisions. Plastic: Lightweight and cheap, but only effective against mud and sand, offering poor protection and short lifespan. Alloy: Lighter than steel and stronger than plastic, but relatively more expensive. Reinforced resin: Lightweight with good toughness, protects against minor impacts and prevents corrosion of the vehicle's underbody metal in humid conditions, avoiding rust and erosion.

What is the general temperature for using car air conditioning in winter?

In winter, the car air conditioning temperature is generally set between 18 degrees Celsius and 25 degrees Celsius. Below are detailed introductions to specific components of the car air conditioning system: 1. Air conditioning pressure sensor: Usually installed after the dryer, it is used to detect the hydraulic pressure of liquid refrigerant flowing through the expansion valve. Three wires: detect high pressure and low pressure. In case of refrigerant leakage and compressor oil loss after a car collision, to prevent compressor damage due to lack of oil, once low pressure is detected, the compressor power is quickly cut off. When high pressure is detected, the compressor power needs to be reduced to avoid wasteful energy consumption. 2. Air conditioning temperature sensor: Usually installed inside the temperature sensing package, it is the evaporator temperature sensor. When the temperature drops to a certain level, the compressor needs to be shut down to prevent frosting and eventual ice blockage from further cooling. 3. Air conditioning compressor relay: Usually installed on the compressor, it is used to control the compressor's start, stop, and power switching functions.

What to Do If a Car Is Not Used for a Long Time?

If a car is not used for an extended period, the following steps should be taken in advance: disconnect the power supply and remove the negative terminal; park it in a garage if available, otherwise find a safe, dry, and shaded location and cover it with a car cover; clean out all items inside the car, especially avoiding leaving snacks inside; maintain sufficient tire pressure by inflating the tires properly. When it's time to drive the car again, follow these steps: 1. Check for tire deformation: If the car remains stationary for a long time, the entire weight of the car is borne by the four tire contact points with the ground, which may cause pressure deformation. Replace the tires if any abnormalities are found. 2. Check tire pressure: Normally, tire pressure may decrease slightly, so it's necessary to inflate them appropriately. 3. Warm up the engine sufficiently: After prolonged parking, the engine oil settles at the bottom of the oil pan, leaving the engine components without lubrication. To allow sufficient time for the oil to lubricate all engine parts and reduce wear, the warm-up time should be slightly longer than usual.

Trending Ranking

What is the chassis code for the BMW 5 Series GT?

Does the Jetour X70 have a rearview mirror tilt-down function?

What is an 8-speed Tiptronic transmission?

Can Full Synthetic Engine Oil Be Used for a Year?

Does Mercedes-Benz have the S400L?

Why can't the Geely Emgrand start with a jump start?

Can the Accelerator and Clutch Be Pressed Simultaneously?

Why is there no sound when playing music via Bluetooth in the 8th generation Accord?

Should I File an Insurance Claim for New Car Scratches?

Is it necessary to go to a 4S shop for new car scratches?

More Forum Discussions

Why does the new car have obvious jerking sensation?

Is There a Purchase Limit for Individuals Buying Cars?

The Impact of Modifying Coilover Suspension

How to Solve the Problem of Excessive Heat in the Car During Summer?

Help

Cookie

Cookie Settings

© 2025 Servanan International Pte. Ltd.