CUMMINS 3929108 GENUINE INTAKE AIR HEATER GRID - OEM FOR 1989-1998 5.9L CUMMINS

The Cummins 3929108 Genuine Intake Air Heater Grid is the OEM electric heating element used in the intake manifold of 5.9L Cummins diesel engines. It preheats incoming air during cold starts to improve combustion, reduce white smoke, and ensure smooth idle in low temperatures.

Replacing a worn or burned-out heater grid with a genuine Cummins part restores reliable cold-weather starting performance and ensures compatibility with the factory intake system.

Features & Benefits

• OEM Quality: Built to Cummins specifications for performance and durability.
• Cold Start Reliability: Heats intake air for better ignition in low temperatures.
• Direct Fit: Bolts directly to the intake plenum without modifications.

Cross Reference Part Numbers

• Cummins 3929108
• Replaces: 3928262
• Interstate McBee M-3929108

Frequently Asked Questions

What are the symptoms of a bad heater grid?

Difficult cold starts, increased white smoke, and rough idle in freezing conditions.

Can I run my Cummins without a heater grid?

Yes, but cold starting performance will suffer, especially below freezing temperatures.

Does this part include mounting hardware?

No. Hardware and gaskets are sold separately.

Fitment

• 1989 Dodge Ram 2500/3500 5.9L Cummins
• 1990 Dodge Ram 2500/3500 5.9L Cummins
• 1991 Dodge Ram 2500/3500 5.9L Cummins
• 1992 Dodge Ram 2500/3500 5.9L Cummins
• 1993 Dodge Ram 2500/3500 5.9L Cummins
• 1994 Dodge Ram 2500/3500 5.9L Cummins
• 1995 Dodge Ram 2500/3500 5.9L Cummins
• 1996 Dodge Ram 2500/3500 5.9L Cummins
• 1997 Dodge Ram 2500/3500 5.9L Cummins
• 1998 Dodge Ram 2500/3500 5.9L Cummins

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