Description

Volvo Penta 21868042 is a genuine OEM aluminum anode kit designed to protect D4 and D6 engines with DPH, DPR, and DPI drives from galvanic corrosion. This kit installs within the cooling/exhaust system and sacrificially corrodes to protect internal components such as heat exchangers and exhaust passages.

Aluminum construction provides longer service life and broader protection compared to zinc, making it ideal for saltwater and brackish applications.

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Key Features

• Genuine Volvo Penta OEM kit
• Aluminum sacrificial anode design
• Includes sealing components (O-rings)
• Designed for internal cooling system protection
• Longer lifespan vs zinc in mixed water conditions
• Direct replacement for OEM specification

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Engine Compatibility

Fits:

• Volvo Penta D4 & D6 engines
• Applications with:
  • DPH drives
  • DPR drives
  • DPI drives

Common on:

• Modern Volvo Penta diesel sterndrive packages

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Serial Number Fitment Notice

Always confirm:

• OEM reference: 21868042
• Supersedes: 21718129
• Engine model and cooling system type

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When This Kit Needs Replacement

• Anode is 50% consumed or more
• Cooling system service interval
• Evidence of corrosion or blockage
• Annual inspection (recommended in saltwater)

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Installation Notes

• Install in designated cooling/exhaust housing
• Replace O-rings during service
• Ensure proper sealing and torque
• Do not paint anodes
• Inspect periodically for wear

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Parts Desk Insight

This is a critical internal protection component—unlike external anodes, failure here leads to corrosion inside the engine, especially in heat exchangers. Aluminum versions like this are now preferred because they last longer and protect across wider salinity ranges.

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Shipping

Shipping: Ships same or next day for fast Canada wide shipping.