Hella 009403321 Manifold Absolute Pressure Sensor 3-Pin Bolted Mount

The Hella 009403321 is a Manifold Absolute Pressure (MAP) sensor designed as a direct-fit replacement for OEM applications. MAP sensors are a critical component of the engine management system, continuously measuring intake manifold vacuum pressure and transmitting that data to the engine control unit (ECU).

The ECU uses this real-time pressure signal to calculate engine load and precisely determine the optimal fuel injection quantity and ignition timing, keeping the engine running efficiently under all operating conditions.

Key Features:

• 3-Pin Connector – Direct plug-in replacement compatible with the factory wiring harness
• Bolted Mounting – Secure, vibration-resistant installation to the intake manifold
• No Gasket / Seal Included – Sold without a gasket or seal; reuse existing sealing hardware or source separately as needed
• OEM-Quality Construction – Manufactured by Hella, a trusted OE supplier to major global automakers, ensuring fit, form, and function consistent with original equipment standards
• Accurate Pressure Measurement – Delivers precise manifold pressure readings to support proper air-fuel mixture, fuel economy, and emissions compliance

Replacing a faulty MAP sensor can resolve symptoms such as rough idling, poor acceleration, hesitation, increased fuel consumption, and illuminated check engine lights related to manifold pressure faults. This Hella unit restores proper engine management function with an OE-equivalent part.