Dodge Durango · Elgin CDJR · Streamwood, IL
Dodge Durango Serpentine Belt Guide
When does the serpentine belt on a Dodge Durango need to be replaced, and what does a worn belt look like? Here is what the 2026 Dodge Durango owner's manual says about the accessory drive belt: the items in its maintenance plans for the 3.6L and 5.7L engines and for the 6.4L and 6.2L engines, which cracks are normal, and the conditions that call for a new belt.
150,000 miReplace, 3.6L and 5.7L
15 yearsOr time, whichever first
60,000 miInspect, 6.4L and 6.2L
120,000 miInspect again, 6.4L and 6.2L
The short answer
For the 3.6L and 5.7L engines, the 2026 Dodge Durango owner's manual lists Replace accessory drive belt, and Inspect accessory drive belt tensioner and pulley, replace if necessary, at 150,000 miles (240,000 km) or 15 years, whichever comes first. For the 6.4L and 6.2L engines, its maintenance plan lists Inspect the accessory drive belts replace if necessary at 60,000 miles (100,000 km) or 60 months and at 120,000 miles (200,000 km) or 120 months. A belt also needs replacing sooner if it shows conditions such as cracks running along a rib, rib chunking, slipping or noise.
When should the Durango serpentine belt be replaced?
The manual has one maintenance plan for the 3.6L and 5.7L engines and another for the 6.4L and 6.2L engines. Their accessory drive belt items are:
| Maintenance plan item | When, per the 2026 manual |
|---|---|
| Replace accessory drive belt (3.6L and 5.7L engines) | 150,000 miles (240,000 km) or 15 years, whichever comes first |
| Inspect accessory drive belt tensioner and pulley, replace if necessary (3.6L and 5.7L engines) | 150,000 miles (240,000 km) or 15 years, whichever comes first |
| Inspect the accessory drive belts, replace if necessary (6.4L and 6.2L engines) | 60,000 miles (100,000 km) or 60 months, and 120,000 miles (200,000 km) or 120 months |
The manual's air conditioner maintenance section adds that the air conditioner should be checked and serviced by an authorized dealer at the start of each warm season, and that drive belt tension should also be checked at this time.
From the 2026 Dodge Durango owner's manual (Maintenance Plan, 3.6L and 5.7L Engines; Maintenance Plan, 6.4L and 6.2L Engines; Air Conditioner Maintenance), read November 9, 2026.
How the manual says to inspect the belt
The manual's accessory drive belt inspection section warns not to attempt to inspect an accessory drive belt with the vehicle running. When working near the radiator cooling fan, disconnect the fan motor lead: the fan is temperature controlled and can start at any time regardless of ignition mode, and you could be injured by the moving fan blades.
When inspecting accessory drive belts, small cracks that run across the ribbed surface of the belt from rib to rib are considered normal and are not a reason to replace the belt. However, cracks running along a rib (not across) are not normal, and any belt with cracks running along a rib must be replaced. The manual also says to have the belt replaced if it has excessive wear, frayed cords or severe glazing.
From the 2026 Dodge Durango owner's manual (Accessory Drive Belt Inspection), read November 9, 2026.
Signs the belt needs to be replaced
The manual lists these conditions that would require replacement:
- Rib chunking (one or more ribs has separated from the belt body)
- Rib or belt wear
- Longitudinal belt cracking (cracks between two ribs)
- Belt slips
- Groove jumping (belt does not maintain correct position on pulley)
- Belt broken (identify and correct problem before new belt is installed)
- Noise (objectionable squeal, squeak, or rumble is heard or felt while drive belt is in operation)
From the 2026 Dodge Durango owner's manual (Accessory Drive Belt Inspection), read November 9, 2026. The manual notes that some conditions can be caused by a faulty component such as a belt pulley, so belt pulleys should be carefully inspected for damage and proper alignment. Belt replacement on some models requires the use of special tools, and the manual recommends having the vehicle serviced at an authorized dealer.
Dodge Durango service at Elgin CDJR
If your Durango's belt squeals, shows cracks along a rib, or is due under the maintenance plan, our Dodge service center can inspect the belt, tensioner and pulleys. Our service department is open Monday to Friday 7 a.m. to 7 p.m. and Saturday 7:30 a.m. to 4 p.m., and is closed Sunday. Elgin CDJR is at 1500 W. Lake St. in Streamwood. Get directions.
Dodge Durango Serpentine Belt FAQ
How often should a Dodge Durango serpentine belt be replaced?
For the 3.6L and 5.7L engines, the 2026 manual lists replacing the accessory drive belt at 150,000 miles (240,000 km) or 15 years, whichever comes first.
What about the 6.4L and 6.2L engines?
Their maintenance plan lists inspecting the accessory drive belts, and replacing them if necessary, at 60,000 miles (100,000 km) or 60 months and at 120,000 miles (200,000 km) or 120 months.
Are small cracks in the belt normal?
Small cracks that run across the ribbed surface from rib to rib are considered normal, per the manual. Cracks running along a rib are not normal, and that belt must be replaced.
What are signs of a bad serpentine belt?
The manual lists rib chunking, rib or belt wear, longitudinal cracking, slipping, groove jumping, a broken belt, and objectionable squeal, squeak or rumble while the belt is operating.
Can I replace the belt myself?
The manual says belt replacement on some models requires the use of special tools and recommends having the vehicle serviced at an authorized dealer.
What are your service hours?
Monday to Friday 7 a.m. to 7 p.m. and Saturday 7:30 a.m. to 4 p.m. We are closed Sunday.
Bring your Dodge Durango to Streamwood
Visit Elgin CDJR at 1500 W. Lake St. in Streamwood.
Sources
The guidance on this page is from the 2026 Dodge Durango owner's manual on Mopar (PDF dated June 8, 2026), read November 9, 2026. Our address and service hours are from our own website, checked the same day.