Product photos available on request
Toyota · Engine Parts
Idler Pulley
OE Number: 16603-31040
Final freight and availability confirmed by our sales team.

Scan to add Cindy on WhatsApp
Scan this code with WhatsApp to add our sales contact, or message us directly about OE numbers, fitment and wholesale pricing.
Message Cindy on WhatsAppProduct Details
- Brand
- Toyota
- Vehicle models
- GRJ120 GRJ150 GRJ200 TRJ12# TRJ150
- Origin
- Fengtong Parts
- Category
- Pulleys and Belt Tensioners
- Cross references
- 16603-31040, 16603-31030, 16603-31040, 16603-31010, 16603-31030, 16603-31050, 16603-31040, 16603-31010
Description
Toyota Idler Pulley (OE 16603-31040) is listed for GRJ120 GRJ150 GRJ200 TRJ12# TRJ150. Cross-reference numbers include 16603-31040, 16603-31030, 16603-31010, 16603-31050. Please provide the vehicle VIN to confirm exact fitment before ordering.
Function
Transfers engine rotation to belt-driven components and, where applicable, helps maintain belt tension and alignment.
When to Inspect or Replace
Inspect the belt and related pulleys together. Replace a component when inspection confirms cracking, fraying, glazing, misalignment, bearing roughness or noise, or tension outside specification.
Service intervals and replacement decisions vary by vehicle. Confirm the OE number and fitment by VIN; have a qualified technician diagnose the vehicle before ordering a replacement.