Best Engine Timing Part Idlers of 2025

Robert Reyes Avatar
Robert Reyes
Last Updated: Jan 2, 2025

* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.

Engine timing part idlers are crucial components in the operation of internal combustion engines. These idlers are responsible for maintaining the correct tension on the engine's timing belt, ensuring that the engine's valves and pistons are synchronized properly. This synchronization is essential for the engine to run smoothly and efficiently, and any issues with the timing belt can cause serious damage to the engine. Engine timing part idlers are available in a variety of sizes and configurations to fit a range of engine types and models, and are manufactured to meet the highest standards of quality and durability.

At a Glance: Our Top Picks

NSK 59TB0515 Timing Belt Idler Cover #TOP 1
NSK 59TB0515 Timing Belt Idler
ftb score rating icon 9.8
GM Timing Chain Idler Sprocket Cover #TOP 2
GM Timing Chain Idler Sprocket
ftb score rating icon 9.7
GM Timing Chain Idler Sprocket Cover #TOP 3
GM Timing Chain Idler Sprocket
ftb score rating icon 9.5

Top 10 Engine Timing Part Idlers

#TOP 1

NSK 59TB0515 Timing Belt Idler

NSK
59TB0515
NSK 59TB0515 Timing Belt Idler Cover
NSK 59TB0515 Engine Timing Belt Idler, 1 Pack

The NSK Timing Belt Idler is designed to provide a perfect fit and optimal performance for your vehicle. With its long-lasting, low-friction bearing, you can enjoy smoother operation and reduced wear over time. The advanced multi-lip seal technology ensures that the idler is resistant to water and contaminants, extending its lifespan and reliability. This means you can drive with confidence, knowing your engine timing system is well-protected and functioning efficiently.

What We Like
Vehicle-specific fit
Long-lasting performance
Water-resistant design
Low friction operation
#TOP 2

GM Timing Chain Idler Sprocket

GM
12612839
Black
GM Timing Chain Idler Sprocket Cover
GM Parts 12612839 Driver Side Engine Timing Chain Idler Sprocket

The GM Timing Chain Sprocket is a reliable part designed specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle. These genuine parts are engineered and tested to meet high standards, ensuring you receive quality components. You can trust that GM Engineers have validated these parts for optimal performance in your vehicle. Additionally, GM frequently updates their designs to incorporate the latest materials and technologies, providing you with advanced solutions for your automotive needs. Choosing this sprocket helps maintain your engine's efficiency and prolongs its lifespan.

What We Like
High-quality engineering
Vehicle-specific design
Updated materials and technology
Trusted by General Motors
#TOP 3

GM Timing Chain Idler Sprocket

GM
12612838
GM Timing Chain Idler Sprocket Cover
GM Parts 12612838 Passenger Side Engine Timing Chain Idler Sprocket

The GM Timing Chain Sprocket is a high-quality component designed specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle. These parts have been rigorously engineered and tested, ensuring they meet the strict standards set by General Motors. You can trust that GM engineers have validated these original equipment parts for optimal performance. Additionally, GM continually updates their designs to incorporate the latest materials and technologies, which can enhance the reliability and longevity of your engine. By choosing this sprocket, you are investing in the durability and efficiency of your vehicle's engine system.

What We Like
High-quality engineering
Designed for specific vehicles
Incorporates new technologies
Reliable performance
#TOP 4

APSG Timing Belt Kit with Water Pump

GEN-057-09080 BGX2
APSG Timing Belt Kit with Water Pump Cover
GENUINE AND OEM TIMING BELT KIT with Water Pump, Idler Pulley, Tensioner, Seals, Serpentine | Compatible with Camry Highlander Sienna RX330 ES330 Avalon Solara

The APSG Timing Belt Kit is designed to ensure optimal performance for your vehicle. It includes genuine and OEM parts, guaranteeing quality and reliability. This complete kit features compatibility with various models such as the Camry, Highlander, Sienna, and others, making it a versatile choice for many drivers. With the included water pump, idler pulley, tensioner, and seals, you have everything you need to maintain your vehicle's timing system efficiently, saving you time and effort during installation.

What We Like
High-quality OEM parts
Complete installation kit
Wide vehicle compatibility
Includes essential components
#TOP 5

X AUTOHAUX Timing Belt Tensioner for Mitsubishi Outlander

a23011100ux0036
Silver Tone, Black
2.05''x2.95''
X AUTOHAUX Timing Belt Tensioner for Mitsubishi Outlander Cover
X AUTOHAUX 1 Pcs Engine Timing Belt Tensioner Pulley Idler for Mitsubishi Outlander 3.0L 2006-2012 1341A012

The X AUTOHAUX Tensioner Pulley is designed specifically for the Mitsubishi Outlander 3.0L models from 2006 to 2012. Made from durable metal, this tensioner is built to withstand wear and resist scratches, ensuring long-lasting performance. Its main function is to guide and stabilize the serpentine and timing belts, effectively reducing the chance of slippage. This pulley can operate mechanically or hydraulically, providing users with reliable functionality. When replacing the pulley, it's important to verify your vehicle model and OE number for the best fit.

What We Like
Durable metal construction
Reduces belt slippage
Specific fit for Outlander
Easy installation
#TOP 6

PartCatalog Engine Timing Belt Idler for Volkswagen Beetle

PartCatalog
PC-1866163
PartCatalog Engine Timing Belt Idler for Volkswagen Beetle Cover
PartCatalog Lower Engine Timing Belt Idler Compatible With Volkswagen Beetle 1.9L L4 DIESEL 2004 2003 2002 2001 2000 1999 1998 P-1866163

The PartCatalog Timing Belt Idler is designed specifically for your Volkswagen Beetle, ensuring a perfect fit and hassle-free installation. This replacement part meets or exceeds the performance of your original equipment, allowing you to experience reliable quality. With its direct compatibility, you can easily replace your old idler without any complications. Just check the specifications to confirm it matches your vehicle's requirements, and enjoy optimal performance every time you drive.

What We Like
Easy installation
High-quality performance
Direct fit
Perfect compatibility
#TOP 7

GM Engine Timing Chain Idler Sprocket Bolt

GM
11588252
GM Engine Timing Chain Idler Sprocket Bolt Cover
GM Parts 11588252 Engine Timing Chain Idler Sprocket Shaft Bolt

The GM Timing Chain Bolt is designed for your Chevrolet, Buick, GMC, or Cadillac vehicle, ensuring a precise fit and optimal performance. These genuine parts are rigorously engineered and tested to meet high standards, giving you confidence in their reliability. By using parts specifically validated by GM engineers, you can be sure that your vehicle will run smoothly. Additionally, GM continuously updates their designs to incorporate new technologies and materials, which helps enhance durability and function, providing you with peace of mind on the road.

What We Like
High-quality engineering
Perfect fit for specific models
Regular design updates
Enhanced durability
#TOP 8

ACDelco TCKWP338 Timing Belt Kit

TCKWP338
ACDelco TCKWP338 Timing Belt Kit Cover
ACDelco Professional TCKWP338 Timing Belt Kit with Water Pump, Tensioner, and Idler Pulley

The ACDelco Timing Belt Kit offers essential components for your vehicle's timing system, ensuring reliable performance. It includes a water pump designed for optimal cooling, which helps prevent overheating during operation. The kit also comes with hydraulic tensioners, enhancing durability and reducing the need for frequent replacements. Sourcing these parts is simplified, making it convenient for you to find what you need without hassle. As a premium aftermarket replacement, this kit delivers the quality and reliability you expect from ACDelco, giving you peace of mind while driving.

What We Like
Durable water pump
Enhanced tensioner reliability
Convenient part sourcing
Premium aftermarket quality
#TOP 9

GM Parts Timing Chain Idler Sprocket

GM Parts
55500069
GM Parts Timing Chain Idler Sprocket Cover
GM Parts 55500069 Timing Chain Idler Sprocket

The GM Timing Chain Sprocket is a reliable component designed specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle. These genuine parts are rigorously tested and engineered to meet high standards, ensuring they perform well under various conditions. By using updated materials and technologies, GM continually enhances their parts, providing you with improved durability and performance. Trusting in GM's expertise means you can have peace of mind knowing that you are getting a product tailored for your vehicle's needs.

What We Like
High-quality engineering
Designed for specific models
Durable materials
Rigorous testing
#TOP 10

A-Premium Timing Chain Kit for Nissan

APTCK051
A-Premium Timing Chain Kit for Nissan Cover
A-Premium 18Pcs Engine Timing Chain Kit W/Idler Sprocket & Guide Rail & Tensioner & More [fits DOHC, L4 1.6L] Compatible with Nissan 200SX 95-98, NX 91-93, Sentra 91-99, Replace# 1302855Y10

The A-Premium Timing Chain Kit is designed for specific Nissan models, including the 200SX, NX, and Sentra. This comprehensive kit includes essential components like upper and lower timing chains, tensioners, and sprockets, ensuring that you have everything needed for a successful installation. Each part is crafted with high-quality materials, providing reliability and smooth operation for your vehicle. With a one-year unlimited-mileage guarantee, you can trust that this kit will enhance your car's performance and longevity, giving you peace of mind on the road.

What We Like
Complete set of essential parts
High-quality materials
Compatible with multiple Nissan models
One-year unlimited-mileage guarantee
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What are the symptoms of a bad idler?

Some symptoms of a bad idler include squeaking noises, an illuminated engine warning light, power steering issues, and frequent engine overheating. These signs may indicate a damaged idler and should be addressed to prevent further damage to the engine.

2. What happens when the idler pulley goes bad?

When the idler pulley goes bad, it can lead to visible scoring marks on its surface due to contact with the belt. Over time, both the pulley and the belt will wear, reducing tension and potentially causing the belt to slip. This can impact the performance of various engine components and should be resolved by replacing the faulty idler pulley.

3. What are the symptoms of a bad idler pulley?

One of the main symptoms of a bad idler pulley is a squealing sound. Additionally, if you notice scoring marks on the idler pulley, it is a sign of wear and damage. It is important to replace the idler pulley promptly to prevent the engine belt from losing tension and slipping, which can result in further issues and potential damage.

Editor's Notes

During our engine timing part idler research, we found 24 engine timing part idler products and shortlisted 10 quality products. We collected and analyzed 3,177 customer reviews through our big data system to write the engine timing part idlers list. We found that most customers choose engine timing part idlers with an average price of $45.92.

The engine timing part idlers are available for purchase. We have researched hundreds of brands and picked the top brands of engine timing part idlers, including NSK, GM, APSG, X AUTOHAUX, PartCatalog. The seller of top 1 product has received honest feedback from 322 consumers with an average rating of 4.5.

Written by
Robert Reyes Avatar

Robert Reyes is a dedicated writer from San Francisco with a bachelor of degree in mechanics and a bachelor of degree in marketing. He focuses on making some complicated topics simple and enjoys explaining complex and technical things in an easy-to-understand way.