Holstein 2MAP4003 Manifold Absolute Pressure Sensor - Supercharger

Holstein MAP Sensor for Select GM Applications

Holstein Parts 2MAP4003 is a manifold absolute pressure sensor for select Chevrolet, Cadillac, Buick, Pontiac, and Oldsmobile applications. It provides the pressure signal the engine control system uses to manage fuel delivery and load calculations, making it a direct-fit service part for specific GM vehicles.

Key Features

• Manifold Absolute Pressure Sensor for emission control and engine management systems
• Holstein Parts product line replacement for select GM applications
• Fits supercharger inlet locations on 2006-2009 Cadillac STS and XLR
• Direct application coverage for 2004-2005 Buick, Chevrolet, Pontiac, and Oldsmobile models
• Cross-references Standard Ignition AS304 and OE-style numbers including 5S2407 and 2131639

Application Details

Holstein Parts 2MAP4003 is used to monitor manifold pressure so the engine control module can respond to changing load conditions. This MAP sensor fits 2008-2012 Chevrolet Chevy, N/A; fits 2006-2009 Cadillac STS, Supercharger; fits 2006-2009 Cadillac XLR, Supercharger; and fits 2004-2005 Buick, Chevrolet, Pontiac, and Oldsmobile models listed in the fitment data. It also cross-references Standard Ignition AS304 for the same application.

Common Issues This Part Can Address

• Faulty manifold pressure signal causing drivability concerns
• Check engine light related to MAP sensor circuit faults
• Incorrect fuel trim or load calculation from a failing sensor
• Rough idle or hesitation tied to inaccurate intake pressure readings
• Service replacement for a damaged or contaminated MAP sensor

Installation Notes

Verify the connector style, mounting location, and engine application before installation. For supercharged Cadillac STS and XLR models, confirm the inlet position shown in the fitment data. Compare the original part number and vehicle year carefully, especially on 2004-2005 models with second-design notes.

Quality Assurance

Holstein Parts 2MAP4003 is built as a replacement sensor for the listed applications and is supported by the brand’s OE-style parts catalog coverage. Confirm fitment against the vehicle’s original MAP sensor configuration before service.