Buy 222-5965 - Genuine CAT Fuel Injector - wisentpartscenter.com

Description

CAT 0R-9348 Fuel Injector - Genuine Caterpillar HEUI Fuel Injector for 3126B / 3126E Engines

The CAT 0R-9348 is a genuine hydraulically actuated, electronically controlled (HEUI) unit injector for the Caterpillar 3126B and 3126E.

Key Functions:

- Delivers the ECM-timed fuel charge to the cylinder on the 3126B/3126E
- HEUI unit injector - relies on high-pressure actuation oil to fire

Fitment & Specifications:

- Application: CAT 3126B, 3126E (confirm by engine serial number)
- Type: HEUI hydraulically actuated fuel injector

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

Purpose of the Part

It's the injector for the 3126B/3126E. On a HEUI engine it needs both the ECM signal and high-pressure oil to fire, so a bad injector - or low actuation pressure feeding it - shows as misfire, low power, or a rough-running cylinder.

Issue Symptoms / When to Replace

- Misfire, rough idle, or a dead cylinder
- Low power, hard starting, excess smoke
- Injection actuation pressure or injector codes on the 3126B/3126E

Diagnose with CAT ET first - on HEUI, the pump or IAP sensor can cause actuation-pressure faults that mimic a bad injector.

Brand Information

A genuine CAT 0R-9348 is built and flow-calibrated to the 3126B/3126E HEUI system with its own trim code, so the ECM fuels that cylinder correctly. Caterpillar builds engines, machines, and components worldwide.

Installation Notes

3126B/3126E HEUI injectors carry an E-trim code that may need entering into the ECM with CAT ET after install; whether it's required varies by engine serial number, so check for your ESN.

How to Identify an OEM Part

Genuine CAT injectors are marked with the CAT part number on the body, plus an individual E-trim code on the top or side.

Why buy from Wisent Parts
  • ⏱️
    Fast shipping
    Orders before 12PM EST ship same business day.
  • 🛡️
    180-day warranty
    All parts covered from delivery date.
  • ↩️
    Easy returns
    30-day returns.
  • ✅
    Verify fitment
    Send VIN/ESN and we’ll confirm.

Shop with confidence

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

Wisent Parts accepts returns within 30 days of delivery. All returns are subject to a restocking fee. To qualify, parts must be unused and in their original condition. For full return instructions and restocking fee details, please refer to the Returns page.