This means that problems often go unnoticed, and significant damage can occur before the owner knows there is a problem. Simply following the scheduled maintenance on your Mini isn't enough to prevent timing chain issues, and the on-board computer doesn't monitor the condition of the timing chain. Faulty timing tensioners can lead to issues, and ultimately complete engine failure. Making matters worse, dealers charge upwards of $1,000 for timing chain replacement and up to $10,000 for an engine replacement. Because these were supposed to be maintenance-free items, they don't typically get checked for wear, and by the time they start making noise, it may be too late. In reality, this design meant that a defective timing chain tensioner can quickly lead chain failure, and finally even engine failure. Located inside the engine, a chain is purported to last the life of the vehicle with no maintenance. Instead of using a belt that needs periodic replacement like many cars do, the Mini employed a metal timing chain. In 2008, BMW released a Technical Service Bulletin (TSB) regarding premature timing chain wear and failure, but it did not issue a recall or provide compensation for those who had such issues. Component Breakdown Timing Chain Problem Backstory If your Mini is suffering from timing chain noises, or premature failure, keep reading and we'll cover everything you need to know to get them fixed properly. Timing chains typically last more than 100k miles in other cars, but the affected Mini models often need them changed at 20-30k miles when they start making noise. Many simply paid for the job themselves, not wanting to risk engine failure over a relatively inexpensive part. The models covered included the 2007 to 2010 R55 Clubman, R56 Hatch, and R57 Convertible with the S motor, owners of which had mixed success getting these components replaced under warranty. Problems with the timing chain tensioner in certain models of the 2nd generation Mini Cooper were all too well known among owners, but it took a lawsuit and several years before BMW/Mini decided to acknowledge and correct the problem. This article applies to the Mini Cooper (2007-2013).
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