21876480 Sensor | Genuine Volvo Penta Part

🔧 Product Description

A genuine electronic pressure sensor used in selected Volvo Penta TAD5 and TAD7 engine-monitoring systems. listed for D7A-TA-HE marine diesel engines (also D5A/D7A/D7C series contacts-and-sensors group).

🚤 Compatibility

Typically suits:

• Volvo Penta D5A-B TA
• Volvo Penta D5A-T
• Volvo Penta D5A-TA
• Volvo Penta TD720VE PP
• Volvo Penta TD520VE
• Volvo Penta D7A-B TA
• Volvo Penta D7A-T
• Volvo Penta D7A-TA
• Volvo Penta D7C-B TA
• Volvo Penta D7C-TA
• Volvo Penta MD2010
• Volvo Penta MD2010B

• Engine Family: D, TD, MD
• HP Range: Approximately 160-330 HP
• Year Range: Approximately 2005 - 2021
• Serial Range: For engine mounted heat exchanger., SN11184144-

⚙️ Key Features

• Factory-calibrated electrical characteristics
• Sealed engine-grade connector or housing
• Supports control, monitoring and protection functions
• Model- and software-specific operation where applicable
• Engine type: Four- or six-cylinder turbocharged industrial diesel
• Also supersedes Volvo part numbers 881667 and 881965

🔌 Function

Converts the assigned operating condition into an electrical signal or processes that signal for the engine-control, display and protection system.

⚠️ Common Signs of Failure

• Incorrect, unstable or missing data
• Implausible-signal or communication fault code
• Engine warning, derate or shutdown
• Open circuit, short circuit or internal electronic failure

🛠️ Service Notes

• Note how the sensor sits and how its lead is routed before removing it, and support the harness so refitting does not leave the cable strained or rubbing
• Turn the sensor with a spanner on its hex only — never lever or twist it by the connector body or the wiring, which breaks the internal joint even when the sensor looks undamaged
• Renew the O-ring or sealing washer where one is fitted, and do not add thread sealant unless the manual for your engine specifies it; sealant on the threads can break the earth path of a sensor that earths through its body
• Tighten to the figure in the workshop manual for your engine — overtightening distorts the housing and shifts or destroys the sensing element
• Make sure the connector is clean, dry and fully latched home and check the pins for corrosion and spread — a poor connector accounts for a great many faults blamed on the sensor — then run the engine and confirm the reading or warning lamp behaves sensibly before returning the boat to service

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21876480 → Supersedes 874650

OEM / Related Numbers

• 874697 earlier number superseded by this part
• 874650 earlier number superseded by this part
• 866838 - related earlier Volvo Penta pressure-sensor reference

📦 Condition

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