MAP Sensor – Fits MerCruiser Volvo Penta 4.3L 5.0L 5.7L 6.2L 7.4L 8.1L (Replaces 8M0054726, 881731, 3861321)

Product Details

This MAP Sensor – Fits MerCruiser Volvo Penta 4.3L 5.0L 5.7L 6.2L 7.4L 8.1L is designed for marine V6 and V8 MPI engines from 1998 and up. Compatible with MerCruiser 4.3L, 5.0L, 5.7L, 6.2L, 7.4L, and 8.1L (496) models, as well as Volvo Penta GM V6 and V8 MPI engines, this sensor delivers reliable manifold absolute pressure readings for optimal fuel management and engine performance.

This aftermarket replacement directly interchanges with OEM numbers 8M0054726, 881731, 861249A1, 3861321, and Indmar S556102.

• Direct bolt-on replacement for factory MAP sensors
• Suitable for gasoline MPI marine engines
• Compatible with both MerCruiser and Volvo Penta applications

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Technical Specs

Sensor Type

Manifold Absolute Pressure (MAP)

Application

Marine MPI engines

Fitment

MerCruiser, Volvo Penta, Indmar

Engine Compatibility

4.3L, 5.0L, 5.7L, 6.2L, 7.4L, 8.1L V6 & V8

Year Range

1998–Up

What's in the Box

• 1 × MAP Sensor

Installation Notes

1. Disconnect the negative battery cable to prevent electrical damage.
2. Locate the existing MAP sensor on the intake manifold or engine harness bracket.
3. Disconnect the electrical connector by pressing the release tab and gently pulling.
4. Remove the sensor mounting fastener (typically one bolt or clip) and extract the old sensor.
5. Install the new MAP sensor in the same orientation and secure it with the original fastener.
6. Reconnect the electrical connector until it clicks into place.
7. Reconnect the battery cable and start the engine to verify proper operation and check for diagnostic codes.

Troubleshooting & FAQ

How do I know if my MAP sensor is failing?

Common symptoms include rough idle, poor acceleration, increased fuel consumption, hesitation under load, or check-engine lights. The engine may also run rich or lean, causing black smoke or stalling.

Can I use this sensor on both MerCruiser and Volvo Penta engines?

Yes. This sensor is a cross-platform replacement designed for MerCruiser V6/V8 MPI engines (1998–2001) and Volvo Penta GM V6/V8 MPI engines (1998–Up), as well as select Indmar models.

What's the difference between this and the OEM sensor?

This is an aftermarket replacement manufactured to OEM-level specifications. It uses comparable materials and tolerances, and is batch-tested in an ISO 9002 facility for quality and consistency.

Do I need to clear diagnostic codes after installation?

In most cases, codes will clear automatically after a few ignition cycles if the fault is resolved. You may use a diagnostic scanner to clear them immediately or verify the repair.

Is the electrical connector the same as OEM?

Yes. This sensor uses the factory-style connector and requires no modifications or adapters for installation.

What is the expected lifespan of this sensor?

MAP sensors typically last several years under normal operating conditions. Lifespan depends on engine hours, maintenance, and environmental exposure. Replace if you experience performance issues or diagnostic faults.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.

Shipping speed & cost

We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.

Warranty & returns

Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.

Safety & Important Info

• Verify images/specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
• This is an aftermarket replacement, not an OEM component.
• Professional installation is recommended for safety and performance.

About Sea Sierra

• Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
• Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
• Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.