Reasons Why Your BMW Won’t Start

Reasons Why Your BMW Won’t Start

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You wake up one morning, go through the daily paces as usual and then when you start your BMW, it doesn’t start. The lights and the radio work, but the car just won’t start. You think the battery connections are loose, you open the bonnet and twist the terminals, but still, it doesn’t start. Today we look at the various reasons that can trigger a no-start condition in your BMW vehicle, and what you need to do to rectify the situation.

Dead Car Battery

The most likely culprit when your car won’t start but the lights turn on is a dead car battery. To rule it out, the mechanic will test its power with a hydrometer. If it is low, it needs to be charged. If it refuses to charge, it needs to be replaced. If it accepts the charge and the vehicle starts, then the problem is solved.

But what causes your BMW car battery to die off regularly? These reasons can kill a battery by themselves, while others are coupled with a battery that is nearly dead.

Leaving your vehicles headlights on overnight drains your battery flat. Make sure to look out for lights left on when it is dark and switch them off. Your vehicle might be designed to leave the headlights on for a few seconds after you switch off the engine, but a defective system might leave the lights on permanently.

An already weak battery

A weak or poorly maintained battery cannot hold the charge for long.

Loose or corroded battery connections. When the connections on your battery are corroded, they prevent the charging system in your BMW from working while you drive. A loose battery connection can cause similar issues.

Faulty charging system. If the battery dies off when you are driving, suspect issues with your charging system. The issue might be stretched or loose belts or worn tensioners that might prevent the alternator from working.

These and other reasons might drain power from the battery or kill it off. When you notice signs of a dying or dead battery, visit Essex BMW specialists for diagnosis of the problem and proper repair.

A Dead Ignition Switch

The ignition switch is part of your BMW’s starting and charging system. When you turn it on, the ignition switch turns on various systems that allow the car to run. When this part of your vehicle fails, power supply to various electrical accessories will also fail. You might turn the car on, but it dies off as soon as the key gets back to the starting position. You might also realize that the car doesn’t respond at all when you switch on the ignition. Your car might also stall unexpectedly when driving.

It is advisable not to drive when you have a problem with the ignition switch. Depending on what point the problem occurs in the ignition switch, you might become stranded, or stall in the middle of traffic.

The Starter

The starter refers to an electric motor which spins the vehicle’s engine when you turn on the ignition. If your ignition switch is working perfectly and the car still won’t start, the problem might be the starter. The starter sets in motion several actions that force the engine crankshaft to turn till the engine begins to run under its power. Failure of the starter to work might be due to an internal failure in the starter or a disconnection between the starter and the solenoid.

Often, you might get a click sound when the starter motor fails, but this isn’t always the rule. Sometimes the starter motor dies off silently, meaning you won’t get the characteristic click when you turn the ignition.

A Faulty Fuel Pump

A malfunctioning fuel pump won’t deliver fuel from the tank to the injector. It won’t be able to create enough pressure to push fuel through the system, which results in loss of engine power or failure of the car to start. You need to get it replaced by a specialist to drive the car.


There are various conditions that can cause a “no-start” condition for your BMW. When this condition happens, you need to call in a repair specialist without hesitation. Trying to drive the car in such a condition can leave you stranded or increase the risk of accidents.



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