Key Features & Benefits

Direct-Fit for AEM 30-4110

No rewiring, no splicing, no drama.
The 30-3441 plugs directly into the Bosch LSU wideband O2 sensor and the matching AEM gauge controller.

Precision-Matched Wiring

AEM uses proper shielding, heat-resistant sheathing, and correct pin configuration to ensure accurate AFR data—critical for tuning, datalogging, and boost-heavy setups.

High-Temperature Protection

The harness is built to survive the harsh environment near exhaust systems, with insulation designed to prevent melt, shorts, and signal interference.

Restores Sensor Accuracy

A failing wideband harness is one of the most common causes of:

• Slow AFR update lag

• Erratic readings

• False lean/rich spikes

• UEGO error codes
  Replacing the harness solves these issues without replacing the entire gauge kit.

Ideal for Maintenance or Repair

If your wiring is:

• Heat-damaged

• Frayed

• Oil-soaked

• Melted from proximity to a downpipe
  …this is the correct replacement part.

Compatibility

This harness is made specifically for:

• AEM X-Series / UEGO 30-4110 Digital Wideband Gauge

• Factory-supplied Bosch LSU 4.9 wideband sensor (as included with the 30-4110 kit)

Not for older AEM sensors that use the LSU 4.2 connector.

Installation Notes

• Plug-and-play: no calibration needed after install.

• Route wiring away from exhaust components, turbo housings, and sharp edges.

• Use heat shielding or loom when positioned near high-temp zones.

• Verify connector seating—wideband accuracy relies on tight contacts.

Average install time: 10–15 minutes.

Final Verdict

The AEM 30-3441 Sensor Harness is the essential replacement piece for any 30-4110 wideband experiencing wiring-related issues. It restores accuracy, prevents false AFR readings, and ensures consistent tuning data.
A must-have spare for turbo, supercharged, and track-driven builds relying on precise air-fuel monitoring.