John Deere Gauge Lvu801663

What It Is

The John Deere Gauge Lvu801663 is a fuel level sending unit (gauge sender) for select John Deere lawn and garden tractors. It monitors fuel level in the tank and sends data to the dash gauge.

Fitment & Compatibility

Before buying, verify your tractor model and year. This OEM part fits John Deere X300, X304, X320, X324, X340, X360, X380, X384, X390, X394, and select X500 series (X530, X534, X540, X560, X570, X575, X580, X585, X590). It also fits some older 400 series (425, 445, 455). Check your existing unit’s connector type – this sender uses a 2-pin flat connector. Measure the mounting flange diameter (approx. 2.5 inches) and the tank depth to ensure the sender arm length matches your tank. Not compatible with diesel models or tanks with different sender hole patterns.

Key Things to Know

• OEM quality – This is a genuine John Deere part, not aftermarket, so fit and durability are factory-spec.
• Installation difficulty – Moderate. Requires draining fuel, removing old sender (may need a spanner wrench for the lock ring), and careful routing of the float arm. No special tools beyond a socket set and pliers.
• Common gotcha – The float arm can be bent during installation; handle gently to avoid inaccurate readings. Also, the gasket (included) must seal properly to prevent fuel leaks.
• Price note – At ~$205, it’s significantly more than aftermarket options, but you’re paying for exact fit and longer service life.

Should You Buy It

Buy this if you own a compatible John Deere tractor and want a drop-in replacement that won’t require modifications or return hassles. It’s ideal for DIYers who value OEM reliability over saving a few dollars on a generic sender. Skip it if you’re on a tight budget – aftermarket versions exist for ~$40-60, but verify fitment and expect possible gauge calibration issues.