Bmw Spark Plug Wires

Written by Jeremy Horelick
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How often must drivers replace their BMW spark plug wires? This is a question open to considerable debate, especially since so many Beamer owners buy their cars for their promise of minimal maintenance. At the same time, BMWs are high-performance cars that are sensitive to even slight perturbations in their operation. A faulty spark plug wire can certainly qualify as a disruption.

Most BMW owner's manuals recommend that drivers check their plugs and wires at least once every 30,000 miles. This is the very minimum, of course; more fastidious owners will have their plugs inspected each time they take their car in for routine maintenance. Even if your BMW spark plug wires appear healthy enough, there's always the chance that they've suffered internal damage to their cores, which is why it's smart to replace them at 100,000 miles.

The Modern Era of BMW Spark Plug Wires

Nowadays, BMW wires (as well as most other types of wires) conform to exacting manufacturing standards. With the advent of electronic ignition systems, spark plug wires tend to boast higher operating ranges, meaning they're less prone to fouling. Nevertheless, owners must be careful when swapping out original manufacturer spark plugs and wires from their BMWs.

One problem with installing your own set of BMW spark plug wires is that of impedance. Most owners--unless they're also mechanics--don't know how to rate the resistance of their wires, which is one of your ignition system's most critical factors. Remember that spark plug wires are designed to impede radio interference with other electrical components in your car, so obtaining a set with a suitable rating is imperative.

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