Volvo Penta Idle Air Control Valve 3843751

Volvo Penta 3843751 is an idle air control valve used in select Volvo Penta gasoline engine applications. Based on the part naming you provided, this component is the IAC or IACV valve that helps control idle speed by regulating bypass air at low throttle openings. It is commonly referenced alongside Volvo Penta numbers 3843750 and 3857696, so those related numbers should be checked carefully against the exact engine setup before ordering.

Key Features

• Genuine Volvo Penta idle air control valve reference 3843751
• Commonly identified as an IAC / IACV idle air control valve
• Helps regulate idle airflow for smoother low-speed engine operation
• Related Volvo Penta reference numbers include 3843750 and 3857696
• Best matched by exact engine and throttle-body application

Engine Compatibility

This part should be treated as a gasoline engine idle-control component rather than a broad all-model sensor. Because IAC valves can vary by throttle-body, intake, and engine-management setup, the safest fitment path is to match 3843751 against the exact Volvo Penta engine serial number and the correct fuel-and-air or throttle-body diagram before ordering.

Serial Number Fitment Notice

Match Volvo Penta part number 3843751 to your engine serial number before ordering. Idle air control valves can look similar across multiple gasoline engine packages while using different connectors, mounting patterns, or control calibrations.

When This Part Needs Replacement

This valve is commonly replaced when the engine has unstable idle, stalling at low RPM, hard starting at idle, surging, or idle-speed faults linked to the air-control circuit. It is also worth checking when carbon buildup, sticking, or electrical failure is suspected in the idle-control system.

Installation Notes

Confirm the connector style and mounting pattern before installation, and compare the removed valve carefully against the replacement part. On idle-control components, exact application matters more than a visual guess. It is also smart to inspect the throttle-body passage and gasket area during service.

Alternate/Superseded Part Numbers

Related Volvo Penta numbers provided with this application are:

• 3843750
• 3843751
• 3857696

These should be treated as related reference numbers that still need exact serial-number confirmation for the specific engine.

Parts Desk Insight

With IAC valves, the easy mistake is replacing the part before confirming the exact application and connector style. Matching by serial number first usually saves time, especially when similar Volvo Penta gas-engine idle-control parts can look nearly identical on the bench.

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