Buy 20R-6733 - Genuine CAT Fuel Injector - wisentpartscenter.com

Description

CAT 0R-4523 Fuel Injector - Genuine Caterpillar MEUI Fuel Injector

The CAT 0R-4523 is a genuine mechanically actuated, electronically controlled (MEUI) unit injector. The engine's cam and rocker drive the plunger while the ECM controls timing and fuel quantity through the injector solenoid.

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

Purpose of the Part

The valvetrain drives the plunger to build injection pressure and the ECM fires the solenoid to control when and how much fuel goes in. A worn or leaking one shows as misfire, low power, hard start, or smoke on that cylinder.

Issue Symptoms / When to Replace

- Misfire, rough idle, or a dead cylinder
- Low power, hard start, excess smoke
- Injector-related codes

Brand Information

A genuine CAT 0R-4523 is built and flow-calibrated to the 3176 with its own trim code, so the ECM meters that cylinder correctly - which off-brand injectors without valid codes can't guarantee. Caterpillar builds engines, machines, and components worldwide.

Installation Notes

- These carry an injector calibration/E-trim code that gets entered into the ECM with CAT ET after install, so the ECM fuels each cylinder correctly. Check the procedure for your engine serial.
- Set the injector height/rack adjustment per spec on install - MEUI injectors are mechanically timed, so the adjustment matters.
- Replace the injector seals and confirm what caused the original failure first.

How to Identify an OEM Part

Genuine CAT injectors carry the CAT part number and a serial on the solenoid label.

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.