Product Description
Genuine Cummins
Cummins 3969987 — Intake Air Heater Grid
MPN: 3969987 | Also Known As: grid heater, intake air heater | Gaskets: Use two (2) 3969988 gaskets
Why This Part
- ✓ OE heater grid for fast, reliable cold starts on 5.9L 24V.
- ✓ Direct-fit replacement for Ram 5.9L (1998.5–2007) with factory intake.
- ✓ Restores proper intake air preheat and drivability in cold weather.
- ✓ Durable OE construction—built to Cummins specifications.
OE Fit Stock Replacement 2 Gaskets Required
Quick Specs
| Type | Intake air heater (grid heater) |
|---|---|
| OE Part # | 3969987 |
| Gaskets | 3969988 (quantity 2, sold separately) |
| Qty Required | 1 per engine (sold individually) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1998.5–2002 | Ram 5.9L ISB (24V VP44) | Ram 2500/3500 |
| 2003–2007 | Ram 5.9L ISB (24V Common-Rail) | Ram 2500/3500 |
Industrial/Off-Highway: Used primarily on Tier 2 ISB/QSB 3.9 applications—always verify by ESN.
Often Paired With
- Intake Heater Gaskets: 3969988 (x2)
- Engine Block Heater Element: 3975628
- Battery/starting system refresh for winter performance
What’s In The Box
- (1) Genuine Cummins Intake Air Heater Grid (3969987)
- Gaskets/hardware sold separately (see “Often Paired With”).
Install Tips
- Use two new 3969988 gaskets; clean mating surfaces thoroughly.
- Torque fasteners to factory spec; verify relay operation and battery health.
- After installation, confirm grid function and check for intake leaks.
FAQ
WILL THIS FIT MY 1998.5–2007 5.9L CUMMINS RAM?Yes—this is the OE heater grid for 1998.5–2007 5.9L 24-valve trucks (VP44 and common-rail). Verify by VIN/ESN.
DOES THIS INCLUDE THE GASKETS?No—order two (2) gasket P/N 3969988.
WILL THIS FIT 12-VALVE (1989–1998) ENGINES?No—12-valve applications use different components. This unit targets 24-valve 5.9L (’98.5–’07).
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3969987 with factory dimensions and electrical characteristics.
WHAT ELSE SHOULD I CHECK FOR COLD-START ISSUES?Battery condition, intake heater relay and wiring, and block heater function (P/N 3975628) all affect cold starting.
Product Videos
Custom Field
Vehicle Year 1998.5-2007
Vehicle Make DODGE
ENGINE 5.9L 24V CUMMINS
