Buy 1833638C91 - Genuine International Engine Brake Solenoid - wisentpartscenter.com

Description

International 1833638C91 Engine Brake Solenoid - Genuine International EBP (Exhaust Back Pressure) Solenoid for T444E / 7.3L Powerstroke

The International 1833638C91 is the exhaust back pressure (EBP) regulator solenoid on the T444E / 7.3L Powerstroke. Under ECM control it operates the exhaust backpressure valve, restricting exhaust to build backpressure for faster cold-engine warm-up and exhaust braking.

Verify fitment with us before ordering to ensure the correct part for your application.

Purpose of the Part

It's the ECM's control valve for the exhaust backpressure system. When the engine's cold or the exhaust brake is called for, the ECM energizes this solenoid, which drives the backpressure valve closed to restrict exhaust flow. That backpressure warms the engine faster on cold starts and gives retarding force on grades.

Issue Symptoms / When to Replace

- No cold-start warm-up / exhaust brake function
- EBP valve stuck open or not responding
- Rough or slow warm-up in cold weather
- EBP-related fault code stored

Brand Information

The T444E is Navistar's own engine - the same one Ford sold as the 7.3L Powerstroke - so a genuine International 1833638C91 is the correct OE solenoid for that EBP system, built to the spec the ECM expects.

Installation Notes

- Plug and play electrically - it's a solenoid, no programming.
- Known oil-seepage point on these engines; inspect the mounting and lines while you're in there, since it's often accessed with the turbo pedestal.

How to Identify an OEM Part

Look for the International/Navistar part number 1833638C91 stamped or tagged on the solenoid.

Why buy from Wisent Parts
  • ⏱️
    Fast shipping
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  • 🛡️
    180-day warranty
    All parts covered from delivery date.
  • ↩️
    Easy returns
    30-day returns.
  • ✅
    Verify fitment
    Send VIN/ESN and we’ll confirm.

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Warranty & Return Information
Warranty Information

Wisent Parts offers a 180-day warranty on all parts from the date of delivery. This warranty covers orders placed directly through our website. If a part fails during this period, we’re here to help - whether it’s a replacement, repair, or refund. For full details, refer to the Warranty page.

Return Information

All electrical parts and final sale items are non-refundable and cannot be returned. Please double-check compatibility before purchase. If you have questions, our support team is here to help before you place your order.