874081 Control Unit | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta control unit for the KAD application, from the Ignition and Control Systems group. It weighs 1.129 kg and is listed for 2 applications across the KAD and KAMD series. It consolidates two earlier numbers, 3803464 and 873964, the latter catalogued earlier as a dataset. The KAD marking is what separates it from control unit 874040, the KAMD unit at 1.161 kg — the two are only 32 grams apart, so identify by the marking and the number, never by feel.

🚤 Compatibility

Typically suits:

• Volvo Penta KAD44P
• Volvo Penta KAMD44P-A

• Engine Family: KAD, KAMD

⚙️ Key Features

• For the KAD application
• 1.129 kg
• 2 applications across KAD and KAMD engines
• Supersedes 3803464 and 873964
• 873964 was catalogued earlier as a dataset
• Also supersedes Volvo part number 873836

🔌 Function

Holds the engine's control programme and governs fuelling and protection functions from the sensor inputs.

⚠️ Common Signs of Failure

• Engine failing to start or stopping with no fuel or air fault found
• Warning lamps lit with no corresponding sensor fault
• Unprompted drop into reduced power
• Water marks or corrosion inside the unit's connector
• Faults that appear only once the unit is warm

🛠️ Service Notes

• Confirm the engine is a KAD before ordering — 874040 is the KAMD unit and they are not interchangeable
• Check supply, earth and connector condition before condemning the unit

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 874081 → Supersedes 3803464

OEM / Related Numbers

• 873964 earlier number superseded by this part
• 3803464 earlier number superseded by this part

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging