Your BMW 535i spark plug wires are an important component of your engine's timing and ignition system. You will find your 535i spark plug wires leading from your distributor cap to your spark plugs. Since your spark plugs are situated at various locations in your engine, a set of BMW 535i spark plug wires are different lengths that are measured for a precise fit with your car.

Your engine gets power when your spark plugs ignite the fuel-air mixture in your combustion cylinders, but that spark has to come from somewhere. That is the function of your 535i spark plug wires.

Your BMW 535i spark plug wires convey electrical power from your distributor to your spark plugs in order to create spark. With tens of thousands of volts of electricity running almost constantly through your 535i spark plug wires, they are bound to lose effectiveness over time. As your BMW 535i spark plug wires age, they can develop cracks in the core or the silicon jackets that encase them. Unfortunately, it is not always possible to visibly detect cracks in your 535i spark plug wires. If your car is experiencing rough engine performance, stalling or stuttering, or engine misfires or detonation, the problem may lie in your BMW 535i spark plug wires. Regardless of problems, your 535i spark plug wires should be changed each time you tune up your engine, as well as each time you change your spark plugs. You can even upgrade to high performance BMW 535i spark plug wires that come with a thick silicon jacket to deliver a hotter spark.Order an inexpensive set of 535i spark plug wires from our extensive online catalogue.