Accessory drive
Serpentine Belt Replacement Guide
Match the belt to the exact engine and accessory layout, then plan a safe replacement around a spring-loaded tensioner.
- Difficulty
- Intermediate
- Typical time
- 45-90 minutes
- Typical supplies
- $35-$120
01 / Fitment
Before you buy
Year, make, and model are a starting point. Confirm these details before relying on a product listing.
- Confirm the exact engine, not only the year, make, and model.
- Compare air-conditioning, alternator, and power-steering accessory layouts.
- Match belt length, width, and rib count to the application.
- Identify the tensioner design and obtain the correct routing diagram.
02 / Get ready
Parts and tools
Parts and supplies
- Serpentine beltMatch the exact engine and installed accessory configuration.
- Tensioner, if wornReplace only after checking alignment, movement, and service limits.
- Idler pulley, if wornInspect for play, noise, damage, or rough rotation.
Tools and equipment
- Belt tool or long-handled ratchetUse the drive size and clearance required by the tensioner.
- Correct socketsNeeded if covers, guards, or mounts obstruct access.
- Work light and inspection mirrorUseful for checking every pulley groove and belt run.
- Routing diagramUse the under-hood label or current service information.
03 / Process
Job overview
This is a planning sequence, not a replacement for the procedure written for your exact vehicle.
- 01Record the routing
Find the correct diagram and compare it with the installed belt before releasing tension.
- 02Inspect the drive
With the engine off and cool, check pulleys, tensioner travel, alignment, and contamination.
- 03Release tension
Use the correct tool and keep fingers clear of pinch points while removing the old belt.
- 04Route the new belt
Seat every rib in its matching groove and leave the easiest pulley for last.
- 05Double-check
Slowly release the tensioner, verify routing and seating, then follow the service procedure for the final check.
Ready to build the list?