Parts for your 2019 Toyota Hiace-Sump plug washers

2019 Toyota HiAce sump plug washers: what they do and when to replace them

Based on Toyota service literature and parts catalogues (Toyota Repair Manual and Toyota Electronic Parts Catalog for 2019 HiAce H200/H300 with 1GD-FTV diesel and 2TR-FE/1TR-FE petrol engines), the engine oil drain plug is designed to be installed with a dedicated crush-type sump plug washer (oil drain plug gasket). Common genuine part numbers include 90430-12031 (M12) and 90430-14008 (M14), with the manual specifying to fit a new washer at each oil change and to torque the plug correctly. So yes, this 2019 HiAce does use a sump plug washer.

For the 2019 HiAce, the sump plug washer is a small, inexpensive hero. Its job is to seal the drain plug to the alloy sump, preventing slow weeps and messy drips after an oil change. Most HiAce engines of this year use an aluminium crush washer that deforms once to match the mating surfaces. That one-time “crush” is what creates a reliable, pressure-tight seal.

Because it’s a crush design, it’s not intended to be reused. Reinstalling an old washer can leave a tiny leak path, which shows up as a damp ring around the plug or a dot of oil on the driveway. Toyota’s workshop instructions call for a new washer at every service and for tightening the plug to spec (typically around 39 N·m on 1GD-FTV diesel, but always verify for the exact engine and VIN). Nipping it up harder isn’t the trick—over-tightening risks stripping threads in the sump and can still leak if the washer’s already crushed flat.

Good servicing habits for HiAce sump plug washers:

• Replace the washer at every oil change, keep a small pack on the shelf.
• Confirm size by engine/VIN—most are M12 or M14 Toyota gaskets (e.g., 90430-12031, 90430-14008).
• Clean the sump face and plug head so the new washer seats squarely.
• Never stack two washers to “make do”, fit one correct new gasket.
• Torque the plug properly—don’t rely on feel with a long breaker bar.

If there’s a light weep after a service, the usual suspects are a reused washer, the wrong size gasket, a nick on the sump’s sealing face, or under/over-torque. Sort those and the HiAce will stay bone-dry under the bonnet between services. Given the low cost and high upside, fresh sump plug washers are a no-brainer addition to every 2019 Toyota HiAce oil change.

Popular questions about 2019 Toyota HiAce sump plug washers

What size sump plug washer does a 2019 Toyota HiAce use?

Most 2019 HiAce variants use an aluminium crush washer in M12 (Toyota 90430-12031) or M14 (90430-14008). The exact size depends on the engine fitted.

The safest bet is to check by VIN or measure the plug thread before service so the right washer is on hand.

How often should the sump plug washer be replaced on a 2019 HiAce?

Every oil change. The washer is designed to crush once and won’t reliably reseal a second time.

Replacing it each service helps prevent slow weeps and keeps the sump threads safe from over-tightening.

What torque should the 2019 HiAce sump plug be tightened to?

As a guide, many 1GD-FTV diesels specify about 39 N·m with a new washer. Petrol variants may differ slightly.

Always confirm the exact spec for the engine code and market manual, then use a torque wrench rather than guessing.