8M0054726 MAP Sensor for Mercruiser Volvo Penta Indmar 4.3L 5.0L 5.7L 6.2L 7.4L 496 8.1L | JLM Marine

MAP Sensor for Mercruiser Volvo Penta Indmar 4.3L 5.0L 5.7L 6.2L 7.4L 496 8.1L

This MAP (Manifold Absolute Pressure) Sensor is engineered for Mercruiser V6 & V8 MPI engines (4.3L, 5.0L, 5.7L, 6.2L, 7.4L, 350 MAG, 496, 8.1L) from 1998–2001, as well as Volvo Penta GM V6 & V8 MPI engines from 1998-Up and Indmar marine engines. It delivers accurate manifold pressure readings critical for optimal fuel mapping and engine performance.

This aftermarket sensor directly replaces Mercruiser 881731, 861249A1, 8M0054726, Volvo Penta 3861321, and Indmar S556102, ensuring reliable compatibility across multiple marine engine platforms.

• Direct-fit replacement for MPI fuel-injected V6 and V8 marine engines
• Compatible with Mercruiser, Volvo Penta, and Indmar engine management systems
• Essential component for accurate air-fuel ratio control

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 × MAP Sensor

Installation Guide

1. Disconnect the negative battery cable to ensure safety during installation.
2. Locate the existing MAP sensor on the intake manifold or firewall area of your engine.
3. Disconnect the electrical connector from the old MAP sensor by pressing the release tab.
4. Remove any mounting fasteners (typically one or two screws or bolts) securing the sensor.
5. Carefully remove the old MAP sensor from its mounting location.
6. Inspect the mounting surface and vacuum port for debris or damage; clean if necessary.
7. Position the new MAP sensor in the mounting location, aligning it with the vacuum port.
8. Secure the sensor with the original mounting fasteners, tightening to manufacturer specifications.
9. Reconnect the electrical connector to the new MAP sensor until it clicks into place.
10. Verify all connections are secure and that no vacuum lines are kinked or damaged.
11. Reconnect the negative battery cable.
12. Start the engine and check for proper operation; verify there are no fault codes or performance issues.

Troubleshooting & FAQ

Q: How do I know if my MAP sensor has failed?
A: Common symptoms include rough idling, poor acceleration, reduced fuel economy, engine stalling, and check engine light activation. A diagnostic scanner will typically show codes related to manifold pressure or fuel trim if the MAP sensor is faulty.

Q: How do I confirm this MAP sensor fits my engine?
A: Cross-reference your original part number with the OEM numbers listed (Mercruiser 881731, 861249A1, 8M0054726; Volvo Penta 3861321; Indmar S556102). Also verify your engine model and year against the compatibility table above.

Q: How often should I replace the MAP sensor?
A: MAP sensors typically last 80,000–100,000 miles or 5–7 years under normal conditions. Replace immediately if you experience performance issues or diagnostic codes indicate sensor failure.

Q: Will this work on carbureted engines?
A: No, this MAP sensor is designed specifically for MPI (Multi-Point Injection) fuel-injected engines. Carbureted engines do not use MAP sensors.

Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.