Parts for your 2016 Honda Civic-Sump plug washers

2016 Honda Civic sump plug washers

Based on Honda’s factory service information and parts data, the 2016 Honda Civic does use a sump plug (engine oil drain plug) washer. The Honda Civic 2016 Service Manual calls for replacing the drain plug washer whenever the engine oil is changed, and the Honda parts catalogue lists a 14 mm aluminium crush washer (commonly Honda P/N 94109-14000) for the drain plug on both the 1.5L turbo (L15B7) and 2.0L (K20C2) engines. Typical torque specified for the drain plug is about 39 N·m (30 lbf·ft). These technical references confirm the sump plug washer is a fitted and service-relevant item on this model.

The sump plug washer on a 2016 Honda Civic is a small, single‑use aluminium crush ring that sits between the sump plug head and the oil pan. Its whole job is to deform slightly when the plug is tightened, creating a reliable seal so engine oil doesn’t seep past the threads or mating face. It also spreads the clamping load to help protect the alloy pan. Because it crushes to seal, it can’t spring back, once used, it won’t seal with the same integrity a second time. That’s why Honda’s service procedures call for a fresh washer at each oil change.

During a routine service, owners or technicians should remove the old washer, wipe the mating surfaces clean, and fit a new 14 mm aluminium washer before refitting the plug. Tighten the plug to the specified torque of around 39 N·m (30 lbf·ft). Over‑tightening can strip threads or distort the pan, under‑tightening can allow a slow drip that leaves spots on the driveway and, over time, lowers oil level. Stick with genuine or OEM‑equivalent aluminium crush washers sized for the Civic’s drain plug. They’re inexpensive, take seconds to replace, and save heaps of hassle later. After refilling, a quick look under the car with the engine running will confirm there’s no weeping around the plug.

Signs a washer needs attention include fresh oil staining around the plug, a damp film on the sump, or a plug that feels loose. Replacing the washer at every oil change—whether following the Maintenance Minder or a 10,000–15,000 km/12‑month schedule—keeps the seal spot‑on. Many owners keep a couple of spare washers in the glovebox so the next service is an easy win under the bonnet with a 17 mm socket or spanner.

Popular questions about 2016 Honda Civic sump plug washers

What size sump plug washer does a 2016 Honda Civic use?
The 2016 Civic typically uses a 14 mm aluminium crush washer on the engine oil drain plug (often referenced as Honda P/N 94109-14000). It’s designed to be single‑use, so swap it out with every oil change to maintain a proper seal. Tighten the plug to about 39 N·m (30 lbf·ft).

How often should the sump plug washer be replaced?
Replace it at every oil change. For many owners that’s when the Maintenance Minder calls for oil, or roughly every 10,000–15,000 km or 12 months, depending on driving conditions. It’s a low‑cost part that prevents leaks and protects the sump threads from over‑tightening.

Can the old washer be reused in a pinch?
It’s not recommended, because the aluminium crush ring deforms once and won’t reliably reseal. If there’s absolutely no alternative, refit temporarily and keep a close eye underneath for any weeping—but replace with a new washer as soon as possible to avoid drips and mess.