![]() ![]() If there’s something wrong with it then it’s worth sorting out as soon as possible. A faulty spark plug can lead to far greater issues with your engine and end up costing you plenty in the long run. Unless something goes wrong they typically last around 40,000-50,000km Is a broken spark plug unsafe? The price for new spark plugs starts at around $5 a plug and can go up to $50 for the high performance ones.Ī full replacement from a mechanic can cost in the range of $50 to $350 depending on the level of difficulty of the job. It’s not a terribly hard job and those who are mechanically minded can do it themselves. How much does a spark plug replacement cost? ![]() A diagnostic or road test is performed to ensure everything is in working order.The new spark plug is bolted into the socket and the ignition cable is reconnected.The spark plug is unbolted with a spark plug socket and removed.Some newer models require the intake manifold to be removed to access the plugs.The bonnet is lifted and the spark plugs are located.Some factors, like your BMW model and the repair shop’s location, significantly affect the spark plug installation cost. On the other hand, BMW X3’s spark plug will cost you 200 to 310. For example, changing the M4’s spark plugs costs around 700 to 4825. What symptoms mean you need new spark plugs The spark plug replacement cost depends on the model of the BMW. This is why you can smell the ‘richness’ when your spark plugs fail.įaulty spark plugs can also lead to engine misfires, this causes damage to the engine and can lead to far more serious problems down the road. This will reduce your fuel economy as some fuel is left unburnt when it is pumped through the exhaust. Old spark plugs won’t transmit the required strength spark. When one of these factors start to fail, the spark is affected and this affects your engine. The strength of the spark is determined by the voltage received and the ability to transmit the spark. When the terminals get worn, the strength of the spark will decrease and this is what leads to misfires and poor running. This voltage is then transferred to the other end of the spark plug where it flows up a tip and sparks across to a terminal with a gap typically around 1mm. What is a spark plug?Ī spark plug is a conductor with a receptor on one end that receives the ignition voltage. This can lead to the engine running rich and decreasing your fuel economy. When they start to fail, the engine will run rough as the spark does not provide strong ignition. Your spark plugs transmit the voltage sent from the ignition module, creating a spark inside the cylinder and igniting the fuel and air mixture. Without one of these components, your car's engine will not be able to work. They are a part of the all important process known as “fuel, air and spark”. ![]() Spark plugs are the reason a petrol powered engine works. ![]()
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