The constant chattering and squealing noises caused by a bad idler pulley will only grow louder if you delay its replacement.
But are you worried about the replacement cost?
Then relax.
We’ll help bust your concerns and provide a complete breakdown of the idler pulley replacement cost. We’ll also highlight eight signs of a bad pulley so you can identify the fault faster.
Let’s begin!
This Article Contains:
- How Much Does an Idler Pulley Replacement Cost?
- Is It Worth Replacing the Idler Pulley?
- Signs You Need an Idler Pulley Replacement
- How Long Does an Idler Pulley Last?
- Can I Replace the Faulty Idler Pulley Myself?
How Much Does an Idler Pulley Replacement Cost?
Here’s what you might pay for an idler pulley replacement service:
A. Range
The average cost of replacing an idler pulley ranges between $160 and $270, including:
- Parts cost: $20 to $100
- Labor cost: $140 to $170
B. Factors Affecting Cost
Your location and the labor rates at local car repair shops are the major factors that affect the final bill. Other factors can include:
- Number of pulleys: Most vehicles usually have one idler pulley, but some specialized cars may have more than one. Depending on how many pulleys your car has, the costs can increase.
- Original Equipment Manufacturer (OEM) vs aftermarket parts: Aftermarket idler pulleys are cheaper than OEM ones. However, OEM pulleys are more durable and last longer.
- Complexity of the service: If an auto repair mechanic has to deal with multiple belts and engine parts during the replacement, it’ll consume time and increase the labor cost.
- Additional services: During the idler pulley replacement, the mechanic may perform a drive belt replacement if they notice signs of damage. This additional service will increase your overall costs by $150 to $250.
Is It Worth Replacing the Idler Pulley?
Definitely!
An idler pulley works with the tensioner pulley to maintain the drive belt’s alignment and tension across different engine pulleys. These pulleys power engine parts like the water pump, air conditioning compressor, power steering pump, and alternator.
When the idler pulley corrodes or breaks, it affects the belt’s alignment and hampers the connection between the engine part and its pulley. Without a stable connection, you’ll start noticing poor power steering, unstable cooling, and weak battery performance.
In the worst case, it can lead to severe engine damage. That’s why you should contact a car repair shop or a mobile mechanic to replace a bad idler pulley ASAP.
Signs You Need an Idler Pulley Replacement
Some indicators of a failing idler pulley are:
- Chattering noise from the drive belt when it spins on a stuck pulley
- Squealing sound when the drive belt rubs against a worn pulley’s surface
- The power steering pump, air conditioning compressor, and alternator stops working
- The car overheats due to a non-functioning water pump
- Illuminated check engine light
- Corroded pulley surface
- Loose pulley
- Pulley spins inconsistently or doesn’t spin at all
How Long Does an Idler Pulley Last?
Your idler pulley should last between 50,000 and 100,000 miles. But it may wear out faster if:
- It’s made of poor-quality material
- It gets clogged with dirt or grime
- It’s misaligned or installed improperly
Your mechanic may also replace the pulley during a serpentine belt replacement, as a torn belt can harm the idler pulley.
Can I Replace the Faulty Idler Pulley Myself?
No, we don’t advise it.
To replace the idler pulley, you’ll have to remove the drive belt, which will require you to disconnect the car battery and sometimes the alternator. You’ll also have to tighten each pulley bolt according to the manufacturer’s specifications, as over or under-tightening can affect the pulley’s performance.
If you’re a novice, performing these steps can be overwhelming. So, it would be best to hand over the task to a professional.
Idler Pulley Replacement Made Simple with AutoNation Mobile Service
The idler pulley aligns your car’s serpentine belt across vital engine components. However, it can gradually wear out or start corroding. Once it’s damaged, your only option is to replace it.
Need help with the replacement?
Contact mobile mechanics at AutoNation Mobile Service!
We’re a mobile auto repair solution offering easy online bookings and a 12-month | 12,000-mile warranty on all related repairs, including a tensioner pulley, crankshaft pulley, and drive belt tensioner replacement.
Get a quote for a stress-free idler pulley replacement service.