GY21749 Battery Cable Compatible with JD D100 D105 D110 D120 D125 D130 D140 D150 D155 D160 D170 E100 E110 E120 E130 E140 E150 E160 E170 E180 X105 X106 X115R X116R X126 X146R X166

What It Is

The GY21749 battery cable is a replacement positive or negative terminal cable assembly designed for select John Deere riding lawn mowers. It connects the battery to the starter solenoid and chassis ground, restoring power delivery in models where the original cable is corroded, frayed, or broken.

Fitment & Compatibility

• Compatible models: JD D100–D170, E100–E180, X105–X166R series (see full list above).
• Check before buying:
  • Measure your existing cable length end-to-end (including ring terminals). This cable is typically ~12–14 inches; if your routing is longer, it may not reach.
  • Verify terminal size: most John Deere models use 5/16" ring terminals on both ends, but confirm your battery post and solenoid stud size.
  • OEM part cross-reference: AM137333 or GY21749. Aftermarket version should match wire gauge (usually 6 or 8 AWG) and insulation type (PVC or rubber).
  • Deck size or engine type doesn’t matter—this is purely a battery circuit part.

Key Things to Know

• Quality: The wire should be flexible, tinned copper for corrosion resistance. If it feels stiff or thin, it may crack in cold weather.
• Installation difficulty: Easy—disconnect battery, remove old cable, bolt on new one. No special tools beyond a wrench or socket set.
• Common gotcha: Polarity—this cable is not polarity-specific, but make sure you’re replacing the correct cable (positive or negative) and not mixing them up.
• Fuse or fuse holder: Some models have an inline fuse on the positive cable; if your original had one, you may need to add a separate fuse holder if this cable lacks it.

Should You Buy It

If your John Deere D100–E180 or X100 series mower has a corroded, cracked, or broken battery cable and you want a direct-fit replacement without splicing, this is a solid, low-cost fix. It’s ideal for DIYers comfortable with basic electrical work. If you need a longer cable or one with an integrated fuse, look elsewhere.