Parts for your 2005 Honda Cr-v-Sump plug washers

2005 Honda CR‑V sump plug washers

Based on Honda technical references — the 2005 CR‑V Service Manual (K24A engine, Engine Lubrication section) and Honda Genuine Parts catalogue — this model’s engine oil drain plug is designed to be used with a 14 mm aluminium crush washer (commonly listed as Honda part 94109‑14000). That confirms a sump plug washer is fitted and relevant for the 2005 Honda CR‑V.

The sump plug washer does the quiet but critical job of sealing the oil drain plug to the alloy sump. When torqued, the soft aluminium crushes slightly to fill any tiny imperfections between the plug and the sump face, preventing weeps and drips. Because it deforms to create that seal, it’s considered a single‑use item. Skipping or reusing it can lead to seeping oil, a messy undertray, or worse, a low‑oil warning after a long motorway run.

For the 2005 CR‑V, replacing the washer at every engine oil change is best practice. That’s typically every 10,000 km or 12 months in AU/NZ conditions (or as specified in the owner’s manual for local schedules). Fit a quality aluminium crush washer sized for the 14 mm drain plug. If an aftermarket washer has a chamfered side, install the chamfer towards the bolt head, genuine Honda aluminium washers are usually symmetrical, so orientation doesn’t matter.

When refitting the plug, clean the sump’s sealing face, thread the plug by hand first, and torque to 39 N·m (29 lb‑ft). No thread sealant is needed — the crush washer provides the seal. After the fill, run the engine briefly, shut down, and check for any sign of seepage. A quick look under the vehicle over the next day or two is a handy belt‑and‑braces check.

• Keep a few spare washers on the shelf — they’re cheap insurance.
• Replace the drain plug if the hex rounds or the threads look tired.
• Never double‑stack old washers, always use a single new one.
• If the sump face is nicked, lightly dress it flat before refitting.

FAQ: 2005 Honda CR‑V sump plug washers

What size and part number washer does the 2005 CR‑V use?
It uses a 14 mm aluminium crush washer matched to the engine oil drain plug. The commonly referenced Honda genuine part number is 94109‑14000, used across many Honda models with 14 mm drain plugs.

How often should the sump plug washer be changed, and what’s the torque?
Replace the washer at every oil change, or any time the drain plug is removed. Torque the drain plug to 39 N·m (29 lb‑ft). Reusing a crushed washer risks minor leaks that can become messy over time.

Can a copper washer be used instead of aluminium?
A quality 14 mm copper crush washer can work, provided it’s soft (annealed) and seals correctly. Honda specifies aluminium, which crushes predictably on the alloy sump. If using copper, confirm proper sealing and still replace it at each service.