Product Description
CUMMINS 3903834 OEM STARTER MOUNTING BOLT (12-POINT CAP SCREW) – RAM 5.9L (1994–2007)
The genuine CUMMINS 3903834 OEM starter mounting bolt is the factory-correct 12-point cap screw used to secure the starter motor to the engine block on 1994–2007 Ram trucks with the 5.9L Cummins. Using the proper bolt is critical to maintaining correct starter alignment, consistent clamping force, and long-term reliability. Worn, stretched, or incorrect hardware can lead to grinding, misalignment, broken housings, and premature starter failure.
This bolt is manufactured to precise Cummins tolerances for high-strength, vibration-resistant retention, ensuring the starter stays locked in position even under harsh cranking loads. For best results, replace mounting hardware anytime the starter is serviced, upgraded, or removed for transmission work.
Key Features
- Genuine Cummins OEM hardware – ensures correct thread engagement and clamping force.
- 12-point cap screw designed for tight clearance areas around the starter.
- High-strength fastener engineered for severe vibration and torque loads.
- Direct replacement for factory starter mounting bolt on 1994–2007 Ram Cummins trucks.
Fitment Details
- Engine: 5.9L Cummins B-Series (12-valve & 24-valve)
- Model Years: 1994–2007 Ram 2500 / 3500 (verify by VIN/ESN)
- Locations Used: Starter-to-block mounting positions
Note: Many starter assemblies require two bolts. Replace both for even clamping force.
Cross-Reference & Companion Cummins Parts
- CUMMINS 3932530 STARTER RELAY BRACKET
- CUMMINS 3911615 ENGINE MOUNT BOLT
- VIEW ALL GENUINE CUMMINS OEM COMPONENTS
Common cross-reference numbers: 3903834, 3903834NX, 3903834-00 (verify by VIN/ESN).
Specifications for cummins 3903834
| Attribute | Value |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Part Number | 3903834 |
| Description | Starter Mounting Bolt / 12-Point Cap Screw |
| Engine Compatibility | 5.9L Cummins B-Series (1994–2007 Ford Ram 2500/3500) |
| UPC | 190861449143 |
| GTIN | 190861449143 |
| Shipping Weight | Approx. 0.05 lb |
| Shipping Method | Ships via standard ground from CPP Diesel |
| Cross Reference | 3903834, 3903834-00, 3903834NX (verify by VIN/ESN) |
| E-Codes | Not emissions-related hardware |
| Prop 65 Warning | WARNING: May expose you to chemicals including metal particulates and residues known to cause cancer and reproductive harm. Visit www.P65Warnings.ca.gov. |
| Country of Origin | As labeled by Cummins (varies by lot) |
Frequently Asked Questions
IS THIS THE CORRECT STARTER BOLT FOR MY 5.9L CUMMINS?
Yes — Cummins 3903834 is used on most 1994–2007 Ram 5.9L trucks. Because some engines use different hardware depending on build date, always verify using your VIN/ESN.
HOW MANY OF THESE BOLTS DOES THE STARTER REQUIRE?
Most starter assemblies use two mounting bolts. We recommend replacing both together to maintain even clamping force and thread engagement.
CAN I USE GENERIC HARDWARE FROM A HARDWARE STORE?
No. Starter bolts require specific hardness, shank length, and thread pitch. Using incorrect bolts can cause misalignment, grinding, and starter or flywheel damage.
SHOULD I APPLY THREADLOCKER?
Cummins does not universally require threadlocker for this bolt, but light-to-medium grade threadlocker is commonly used in high-vibration applications. Follow OEM service manual guidelines.
IS THIS A GENUINE CUMMINS BOLT?
Yes. CPP Diesel supplies only genuine Cummins hardware for this listing.
