Fuel Injectors for 2008–2020 Dodge Challenger

How long do Challenger injectors last across the different engines?

The 3.5L V6 injectors typically fail between 100,000-130,000 miles from internal filter restriction. Pentastar 3.6L injectors last slightly longer, 110,000-150,000 miles, but carbon buildup accelerates wear on direct-injection cars after 2015. The 5.7L Hemi injectors handle 120,000-160,000 miles before o-rings leak or spray pattern degrades. The 6.2L SRT motors see failures around 90,000-120,000 miles due to higher operating pressure. Flex-fuel engines running E85 regularly lose 20,000 miles off those averages. Track use or frequent wide-open throttle cuts lifespan by 30%.

Can I replace Challenger injectors myself or does this need a shop?

The V6 engines are straightforward—fuel rail unbolts with four 8mm bolts, injectors pop out with a twist. Budget two hours if you've done basic engine work. The 5.7L and 6.2L Hemi motors require removing the intake manifold, which means disconnecting throttle body, brake booster line, and about 14 bolts. It's a five-hour job first time through. You'll need a fuel pressure gauge to verify system is depressurized and new o-rings for every injector. The Pentastar has tight clearance on the rear bank—you'll fight it without a swivel socket set.

What diagnostic steps confirm bad injectors versus other fuel system issues?

Start with a fuel pressure test—these need 58 PSI at key-on for V6, 60 PSI for Hemi motors. If pressure's good, pull codes and note which cylinders are misfiring. Swap coil packs and plugs to those cylinders first—Hemi engines throw false injector codes when coils fail. If misfire follows the component, it's not the injector. If it stays on the same cylinder, use a noid light to check injector pulse. No pulse means wiring or PCM driver. Good pulse but still misfiring, swap that injector to another cylinder and retest. Misfire moves with the injector, you found it.

Do Challengers have a specific injector problem I should know about?

The 5.7L and 6.2L Hemi engines develop a pattern where the number 5 and 7 injectors (rear bank, center positions) leak from o-rings first. Heat soak from the exhaust manifold cooks the lower o-ring. You'll smell fuel after hot shutdown and sometimes see fuel residue on the manifold. This can trigger P0457 evap codes alongside the misfire because vapors confuse the system. The 3.6L Pentastar injectors don't fail as often, but carbon buildup on intake valves mimics failed injectors perfectly. Always walnut-blast the valves before condemning injectors on high-mileage Pentastar motors.