What size is the drain plug on a Lexus IS 350?
The engine oil drain plug on the Lexus IS 350 uses a metric M14 x 1.5 thread and has a 14mm hex head. In practice, this means you’ll typically loosen or tighten it with a 14mm socket or wrench.
For the IS 350, which is equipped with a 3.5-liter V6 (2GR-FSE), this specification is standard across many model years. The drain plug sits on the underside of the oil pan and is accessible from beneath the vehicle when it’s safely raised. Always confirm against the owner's manual or official service documentation for your exact year and market, as there can be minor variations.
Standard size across IS 350 models
Most IS 350 examples share the same M14 x 1.5 drain plug. If you’re replacing the plug or performing an oil change, you can rely on the M14 x 1.5 size, but verify by inspecting the existing plug or checking your specific service information for your VIN/year.
How to verify the plug on your car
To confirm, inspect the thread on the plug you remove and compare with an M14 x 1.5 replacement, or consult the official service manual for your exact vehicle. If you need to replace, use a new drain plug with a compatible sealing washer if your model requires one.
Practical tips for removal and replacement
When removing or tightening the drain plug, use the appropriate tool (commonly a 14mm socket) and avoid overtightening to prevent thread damage in the oil pan.
Summary: The Lexus IS 350 uses an M14 x 1.5 drain plug with a 14mm hex head. Verify this against your exact year and market in the service manual and use proper torque to avoid damage.
