This little piece basically keeps your timing chain on track. It’s a metal piece, often plastic coated, that runs along the chain and makes sure it doesn’t jump or wobble around. It guides the chain’s movement, ensuring it stays lined up with the sprockets. Sometimes there’s more than one – an upper and a lower, for example – to control the chain along its whole path. It’s part of the timing system, which is absolutely critical. The timing system makes sure all the engine’s internal parts – pistons, valves, camshafts – work together at the right time. The timing chain transfers power from the crankshaft to the camshaft(s), and the guide rail keeps that chain moving smoothly and correctly. It's positioned right alongside the chain, often pressed into place. If this rail wears out or breaks, the chain can slap around. That can cause a lot of problems, from rough running to a complete engine failure. Think of the guide rail as a shield, protecting the engine from the chain getting out of position. You'll notice if one fails – typically you’ll hear a rattling noise, especially on startup, and the engine might run poorly. If ignored, a failing guide rail can lead to the chain jumping teeth, which causes valves to hit pistons - a seriously expensive repair. You can find these fairly easily, places like Fixparts Online usually have a good selection. It’s a relatively inexpensive part considering the damage it prevents, so it’s good to address it if it’s making noise or you suspect it’s failing. A warranty you can count on: Guide Rail (MPN 066109514A) has a 12-month guarantee!

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• Get parts made specifically for your VW, ensuring a perfect fit and reliable performance. • Volkswagen parts are quality-tested to meet high standards, so you can drive with confidence. • Using genuine VW parts helps maintain your vehicle’s value. • We have a wide selection of parts, from everyday maintenance items to more complex components. Volkswagen – trusted quality, available at FixParts Online!