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Is the BMW 525 equipped with an air pump?

2 Answers

LukeFitz

07/28/25 9:04pm

The BMW 525 is equipped with an air pump. After starting the engine and placing the air pump on a flat surface, turn on the air pump. When the gauge reading reaches the appropriate tire pressure for the car, stop the machine to complete the inflation. Air Pump: An air pump, also known as an inflator or air compressor, operates through the running of a motor. When the motor runs and sucks in air, the valve of the connecting device is pushed open by atmospheric pressure, allowing air to enter the cylinder. When pumping air into the tire, the valve is closed by the pressure inside the cylinder, directing the air into the tire. Principle of the Air Pump: Regardless of the reason for a pressure drop in the pressure-holding circuit, the booster pump will automatically start to compensate for the leakage and maintain constant circuit pressure. Safe operation: It is gas-driven, with no arcs or sparks, making it completely suitable for use in environments with flammable or explosive liquids or gases. Simple maintenance and high cost-effectiveness: The booster pump is a plunger pump. During operation, it rapidly reciprocates. As the output pressure increases, the pump's reciprocating speed slows down until it stops, at which point the pump maintains constant pressure with minimal energy consumption, and all components cease movement.

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MacGriffin

08/12/25 1:46am

I picked up my 525 last year, and there was only a simple tire repair fluid kit in the trunk without a standalone air pump. That day when the tire pressure warning light came on, I checked all the compartments but couldn’t find an air pump. Later, the 4S store explained that BMW doesn’t include this as standard. However, I spent a little over 300 yuan to buy a Xiaomi portable air pump, which fits perfectly in the spare tire well. It has a digital display and allows preset tire pressure values, making it super convenient to use. I recommend new car owners to get one, as punctures on the road are quite common. Just remember to choose a model with a built-in tire pressure gauge, so you can top up the air yourself at highway rest stops and avoid being overcharged.

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