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What are the reasons why the BYD S7 won't start?

6 Answers
TannerLee
07/24/2025

Reasons why the BYD S7 won't start: 1. The battery is dead, possibly due to prolonged headlight use or the battery reaching the end of its lifespan. The solution is to replace the battery immediately. 2. Check the vehicle's spark plugs. The proper functioning of the spark plugs is crucial for the car's performance and efficiency. The solution is to unscrew the spark plugs and clean them. 3. Incorrect gear position. For automatic transmission cars, the gear must be in P or N position to start. If it's in R or D, the car won't start. Some manual transmission cars also won't start if the clutch isn't depressed. 4. Fuel quality issues. Owners should use standard gasoline. When refueling outside, a gauze can be used to cover the fuel nozzle to filter impurities. 5. Excessive carbon buildup in the car can also prevent it from starting. The solution is to frequently drive at high speeds to reduce carbon buildup.

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Keira
08/10/2025

I've been driving a BYD S7 for several years and have encountered the issue of the car not starting several times. The most common problem is with the battery, which might be old, have insufficient charge, or have loose or corroded terminals. If turning the key doesn't elicit any response or you only hear a clicking sound without the engine turning over, it's likely the battery needs replacing. Ignition system failure is another major cause; spark plug carbon buildup or damaged high-voltage wires can affect starting. If the fuel pump is faulty and can't supply fuel, the car won't start either. A stuck or worn starter motor can also cause issues, and sometimes the anti-theft system might mistakenly lock the car, requiring a key re-match. I've also experienced problems due to aging wiring or blown fuses, which beginners might easily overlook. Regular maintenance is crucial; check the battery voltage and clean the terminals monthly, and pay extra attention to the battery's condition in winter to avoid sudden breakdowns and inconvenience.

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DiGabriel
09/26/2025

When I first bought the BYD S7, I also encountered issues with the car not starting, which is usually due to a dead battery or loose connections. If you try to start the car and there's no response, it's mostly likely that the battery needs charging or replacing. Faulty ignition coils or spark plugs are also common causes, especially after the vehicle has high mileage. Issues with the fuel system, such as a non-functioning fuel pump or a clogged fuel filter, can also prevent the engine from starting. Problems with the starter, like a broken motor or a circuit interruption, can also be the culprit. Sometimes, the anti-theft system may lock up and require a restart and matching. I think a quick check can start with the simple things: first test the battery voltage, check the fuse box, and then pay attention to any abnormal indicator lights on the dashboard. Developing good habits like turning off lights when the engine is off and regular maintenance can prevent a lot of trouble.

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SanChristian
11/09/2025

The BYD S7 won't start, possibly due to low battery power or ignition system issues. If turning the key produces no response or the engine doesn't crank, the battery usually needs checking. Fuel pump failure causing poor fuel supply is another factor. Security systems like anti-theft locks can prevent startup. Wiring short circuits or blown fuses are also common occurrences. I believe this affects driving safety, so it's best to address it promptly to avoid breakdowns on the road.

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OAlejandro
11/09/2025

I think the BYD S7's failure to start is mostly due to electrical circuit issues or motor malfunctions. Insufficient battery power or oxidized terminals are the most common causes. Aging ignition components like spark plugs can also prevent the car from starting. A damaged fuel pump or clogged filter is another reason. Starter motor jamming or broken circuits can cause similar issues. You can perform simple checks yourself, such as inspecting fuses and cleaning battery terminals. Regularly using diagnostic tools for monitoring can help prevent these problems.

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McRiley
12/31/2025

The BYD S7 won't start, with a depleted battery usually being the primary cause, and loose connections can also lead to this issue. Ignition system failures, such as damaged high-voltage wires, prevent the engine from starting. Fuel pump problems causing interrupted fuel supply are another possibility. Worn-out starters or the anti-theft system mistakenly locking are also reasons. I've found that regularly replacing key batteries and checking the battery status can prevent these issues, ensuring smooth starts and fewer malfunctions.

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