Sierra 223-6401 Generator Anode, Replaces Onan 130-4434, Fits Select Onan MDK Series Generators

The Sierra 223-6401 is a replacement anode engineered for select Onan MDK-series generators. Anodes are a sacrificial component that protect surrounding metal parts from corrosion by attracting galvanic wear away from the generator housing, making periodic anode replacement an important part of routine generator maintenance for boat owners running an Onan genset. This anode is a direct replacement for Onan part number 130-4434, allowing a straightforward swap without modification.

Finished in a gold-tone coating, the 223-6401 is built to Sierra's standard for matching or exceeding the fit and function of the original equipment part it replaces. It is a compact, lightweight component at 0.12 pounds, designed to be installed as a routine service item during scheduled generator maintenance. Sierra backs the part with its standard customer satisfaction warranty covering defects in workmanship and materials.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 223-6401
• UPC: 808282288938
• Weight: 0.12 pounds
• Color: gold
• Category: Onan Generator Parts
• Replaces: 130-4434

Fitment

• Onan MDKAV
• Onan MDKAW (Spacesaver)
• Onan MDKAZ
• Onan MDKBD
• Onan MDKBD (w/ Isolated Ground)
• Onan MDKBE
• Onan MDKBE (w/ Isolated Ground)
• Onan MDKBF
• Onan MDKBF (w/ Isolated Ground)
• Onan MDKBG
• Onan MDKBH
• Onan MDKBK
• Onan MDKBL
• Onan MDKBM
• Onan MDKBN
• Onan MDKBP
• Onan MDKBR
• Onan MDKBS
• Onan MDKBT
• Onan MDKBU
• Onan MDKBV

Replaces (OEM)

• 130-4434

Frequently Asked Questions

What generator models does the Sierra 223-6401 anode fit? The Sierra 223-6401 fits select Onan generators including the MDKAV, MDKAW (Spacesaver), MDKAZ, MDKBD, MDKBD (w/ Isolated Ground), MDKBE, MDKBE (w/ Isolated Ground), MDKBF, MDKBF (w/ Isolated Ground), MDKBG, MDKBH, MDKBK, MDKBL, MDKBM, MDKBN, MDKBP, MDKBR, MDKBS, MDKBT, MDKBU, and MDKBV models.

Does the 223-6401 replace Onan part 130-4434? Yes, the Sierra 223-6401 is a direct replacement for Onan part number 130-4434.

How much does the Sierra 223-6401 anode weigh? It weighs 0.12 pounds.

What color is the Sierra 223-6401 anode? It has a gold finish.

Is the Sierra 223-6401 a genuine Sierra part or aftermarket? The 223-6401 is a genuine Sierra part, backed by Sierra's customer satisfaction warranty covering defects in workmanship and materials.

What is an anode used for on an Onan generator? An anode is a sacrificial component that corrodes in place of surrounding metal parts, protecting the generator housing from galvanic corrosion; it is why anodes such as the 223-6401 need periodic replacement.

How do I know if my generator's anode needs replacing? A generator anode that has visibly corroded or worn away, such as the Sierra 223-6401, should be replaced to keep protecting the surrounding metal components from corrosion.

Is installation of the 223-6401 straightforward? Yes, since it is a direct replacement for Onan part 130-4434, the Sierra 223-6401 installs in the same location without modification.

What is the UPC for the Sierra 223-6401? The UPC is 808282288938.

Does Sierra offer a warranty on the 223-6401 anode? Yes, all Sierra parts, including the 223-6401, qualify for Sierra's customer satisfaction warranty, which covers defects in workmanship and materials for the useful life of the product.