Parts for your 2003 Honda Stream-Sump plug washers

2003 Honda Stream sump plug washers: what they do and when to replace them

Technical sources confirm the 2003 Honda Stream does use a sump plug washer. Honda’s electronic parts catalogue for RN1–RN5 models lists a 14 mm aluminium drain plug crush washer (commonly referenced as Honda PN 94109-14000), and the factory workshop manual and owner’s maintenance schedule instruct replacing the washer at each engine oil change. So yes—this part is absolutely fitted and relevant to the 2003 Honda Stream.

On the 2003 Honda Stream, the sump plug washer is a small, single-use aluminium ring that sits under the engine oil drain bolt. Its job is to deform slightly—“crush”—as the bolt is tightened, filling microscopic gaps between the bolt head and the sump. That creates a reliable seal to keep engine oil inside the pan and off the driveway. Because it crushes to seal, it’s designed to be replaced, not reused.

Owners and workshops in Australia and New Zealand will typically see this washer swapped at every service that includes an oil change. That aligns with Honda’s guidance across D17A (1.7L) and K20A (2.0L) Stream variants. Reusing a flattened washer can lead to weeping, drips after a hot run, or the temptation to overtighten the plug—risking stripped threads in the alloy sump. A fresh washer lets the plug seal properly at the correct torque, about 39 N·m.

Good practice under the bonnet is straightforward. Keep a small stash of quality 14 mm aluminium crush washers—OEM style is ideal, but reputable aftermarket ones are fine. During servicing:

• Remove the old washer from the drain bolt and bin it.
• Wipe the sump’s sealing face clean, check for nicks or burrs.
• Fit the new washer, refit the plug by hand to avoid cross-threading, then torque to spec (around 39 N·m).

If a magnetic or aftermarket sump plug is fitted, use the crush washer unless the plug maker explicitly specifies an O-ring-only design. After refilling with the correct oil grade and quantity, run the engine, then check for any seepage around the plug. A dry plug face is what’s wanted.

Signs a washer needs attention include fresh oil mist around the plug, a plug that feels “loose” after driving heat cycles, or evidence the washer has been reused multiple times (flattened, grooved, or hard). Swapping this cheap little ring at each oil change is an easy win for leak-free motoring and tidy servicing on a 2003 Honda Stream.

Popular questions about 2003 Honda Stream sump plug washers

What size sump plug washer does a 2003 Honda Stream use?
The Stream uses a 14 mm aluminium crush washer on the engine oil drain bolt, as shown in Honda’s parts listings for RN1–RN5 models. This suits both the 1.7L D17A and 2.0L K20A engines used in 2003 models.

How often should the sump plug washer be replaced?
Best practice is at every oil change. That matches Honda workshop guidance and helps achieve the correct seal at the specified torque. For many AU/NZ service schedules, that’s roughly every 10,000 km or 12 months, depending on conditions.

What torque should the drain plug be tightened to?
Tighten the drain bolt to about 39 N·m. Using a torque wrench with a fresh crush washer prevents over-tightening and protects the sump threads while ensuring a proper seal.