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BMW X5 Ignition Coil

How to Tell if You Have Bad BMW X5 Ignition Coils

Engine misfires are caused by different reasons, and one of them is bad ignition coils. The ignition coils provide good spark to your distributor. They are made to last quite a while but with use and age, they become worn and do not function as they should. The most typical causes of coil failure include a dying battery, corrosion from air flow, and exposure to chemicals such as lubricants and solvents used around the engine. When your BMW X5 ignition coils are worn out, they cause misfires as well as a number of other engine problems. Take a look at the following symptoms of bad ignition coils.

Start failure, stalling, and stopping

When you find considerable difficulty in starting your car, it may be the ignition coils going bad. Also, bad coils can still provide current to the spark plugs so they can burn the fuel, but the current is no longer enough. That's why stalling is a big probability. A totally failed coil, in the other hand, will prevent the engine from starting. And when the coils completely fail while the car is running, it will suddenly stop working altogether, leaving you right in the middle of the road. In this case, even if you jumpstart the battery, your X5 will not work at all.

Lack of power

Because of the deficient current transferred from the battery to the spark plugs, the engine may not receive the sparks needed to keep it running. This results in the rough idle you may notice like when waiting for the green light and in the jerky acceleration when you try to speed up while driving. Besides this, the other electronic accessories such as the radio and the lights will be weaker or dimmer.

High emissions and lower fuel efficiency

Another symptom of bad ignition coils in your BMW X5 is the black smoke and the smell of gasoline that comes out from the exhaust. This is because of the decrease in fuel efficiency. With the lack of power to burn the fuel, it comes out of the other end not completely used up. This consequently leads to higher expenses on fuel.

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  • Tips to Maintain the Top Performance of Your BMW X5 Ignition Coils 04 March 2014

    Ignition coils are a car's power line. They take power from the battery to the spark plug, which then fires up for combustion and burn fuel to get your BMW X5 up and running. Even though they are built tough, they still get worn out because of the constantly high levels of current that go through them when in use. And when they become bad, many other engine components will be affected, creating a giant domino effect that results in your X5's not working at all.

    • Monitor your battery.
    • Weak batteries put a lot of stress on the coils, so check your car's battery regularly in to prevent the premature wear of the coils. Your BMW X5 battery can last up to five years. But after over half of its expected lifetime, you may want to do some checking after every 2 months or so, depending on how much you use your car.
    • Don't ignore leaks in the engine.
    • Corrosion in the coils is a result of leaking lubricants, solvents, etc. that are common around the engine and its components. The leaks corrode the connecting points, which cause lower grade or intermittent sparks. If there is insufficient power, you might experience start failures, stalling, and even sudden stopping. Make sure all gaskets, sealants, and caps are securely in place and are functioning properly. In the end, you will not only be prolonging the life of your ignition coils, but also all the other engine components.
    • Keep spark plugs in optimum condition.
    • You can clean your BMW spark plugs every few thousand miles to prolong their useful life. This can be done by using either pure alcohol or brake cleaners. These liquids are the ideal cleaning agents for these parts because of their quick-drying characteristic. After this, you will need to subject them to pressurized air to completely get rid of all bits of debris.On the other hand, running your car with worn spark plugs forces the ignition coils to operate at a much higher output. This works the coils up much more than they are normally capable. This causes their early wear. For this reason, the spark plugs must be changed every 30,000 miles.