BMW idler pulley replacement costs & repairs

Frequently Asked Questions

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If you’ve booked with a workshop, the service provider will usually require your vehicle for the entire day due to scheduling. If you’ve booked with a mobile provider, you will only be without your vehicle for the time it takes to complete the job. Find out more

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For servicing, inspections and select repairs, we can provide instant quotes. However, some tasks require a quote request to be sent to service providers. You will usually receive at least one quote within 24 hours.

If you have sent off a quote request to local service providers through AutoGuru, you can expect to receive up to five quotes back.

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3. In some instances, you can choose to pay the mechanic when you pick your car up and the service and/or repairs have been completed

Yes, all service providers should provide an invoice when you pick up the car. Find out more

Can I Keep Driving My BMW With a Faulty Idler Pulley?

The accessories attached to your BMW engine rely on power from the crankshaft to operate.

Utilising drive belts, the energy of the revolutions of the crankshaft is transferred to these accessories.

But what keeps the belts in check so they don’t fall off? That’s the job of the idler pulley.

Its main job is to keep the correct tension on the belt from the tensioner and help guide the belt to stay on the correct routing without coming off.

These idler pulleys rely on bearings to keep them spinning freely and are usually made from plastic, although some models have idler pulleys made from pressed metal or composite materials.

The high temperatures in the engine bay and constant motion on these pulleys can wear them out over time, and the only option is to replace them.

Failure of the idler pulley can cause the drive belt to dislodge from the engine, causing further problems for your BMW.

The belts drive the alternator, water pump and power steering pump. Overheating and loss of power steering are symptoms that either the belt or one of the pulleys has failed.

Other symptoms can be a battery warning light illuminated in the instrument panel, squealing or screeching noise from the engine or a burning smell from the engine bay.

There is often more than one idler pulley fitted to your BMW's engine and if one fails, it’s best to have them all replaced at the same time to save on labour costs.

The drive belt should also be replaced when replacing idler pulleys to ensure correct operation.

Not only is it embarrassing to have your BMW squealing when you drive, but you also risk breaking down if the idler pulley can no longer keep tension on the drive belt.

This can happen at any time, without warning and will leave you without power steering and can cause the engine to overheat or the battery to go flat.

It’s best to have your idler pulleys replaced as soon as you notice a problem to ensure your BMW continues to operate correctly. That's where AutoGuru can help.

Frequently Asked Questions

BMW Idler pulley replacement

BMW Idler pulley replacement

Can I Keep Driving My BMW With a Faulty Idler Pulley?

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