Fuel Injectors for 1998–2021 Dodge Durango

How long do Dodge Durango fuel injectors last?

Hemi 5.7L and Pentastar 3.6L injectors typically last 90,000-130,000 miles before carbon buildup or O-ring failure causes issues. The older 4.7L PowerTech injectors often need replacement around 110,000 miles due to varnish deposits. The 5.9L Magnum injectors from 1998-2003 can fail earlier—around 80,000 miles—because the pintle design cracks under heat cycling. If you're towing regularly or running low-grade fuel, expect the lower end of these ranges.

Can I replace Durango injectors myself?

On the 3.6L V6, the rear bank injectors require removing the intake plenum—a 4-hour job with careful torque sequences on reassembly. The 5.7L Hemi is easier; you pull the fuel rail after depressurizing the system, and injectors pop out with a twist. Budget 2 hours. The 4.7L and 5.9L V8s are straightforward—remove the fuel rail, disconnect clips, swap injectors. You'll need a fuel line disconnect tool and a way to relieve the 58 PSI rail pressure safely.

What codes indicate bad injectors on a Durango?

P0201 through P0208 are cylinder-specific injector circuit codes. P0300 random misfire combined with P0171/P0172 lean/rich codes points to multiple injectors flowing incorrectly. On the Hemi, watch for P0316 (misfire on startup)—that's often a leaking injector flooding a cylinder overnight. The 3.6L throws P0300 with no other codes when O-rings leak vacuum. Pull the injectors and check the lower O-rings for cracks or fuel staining on the intake runners.

Do Hemi Durangos need special injector cleaning?

The 5.7L Hemi's Multi-Displacement System (MDS) creates uneven fuel delivery across cylinders 1, 4, 6, and 7 when they deactivate. Carbon accumulates faster on those four injectors. You'll see misfires on cylinders 1 and 4 first. Using Top Tier fuel helps, but by 100,000 miles most Hemis need injectors replaced or professionally flow-tested. Avoid cheap fuel system cleaners—they don't reach the pintle tip where carbon hardens on these direct-mount injectors.