Parts for your 2010 Mazda Premacy-Sump plug washers

2010 Mazda Premacy sump plug washers

Based on technical sources, the 2010 Mazda Premacy does use a sump plug washer (also called an oil drain plug gasket). The Mazda Premacy/Mazda5 (CR) Workshop Manual for the engine lubrication system specifies replacing the drain plug gasket at oil changes and tightening the plug to the stated torque. The Mazda Electronic Parts Catalogue for the 2010 model year lists an M14 crush-type gasket for the oil pan drain, and common AU/NZ aftermarket catalogues also list an M14 washer for this vehicle. Put simply, it’s a fitted and serviceable item on this model.

On the 2010 Premacy, the sump plug washer is a small but crucial seal that sits between the drain plug and the sump. Its job is to crush slightly as the plug is tightened, creating a reliable, leak-free seal that handles heat cycles and vibration. Most are aluminium crush washers (some use copper), sized to suit the M14 drain plug used across many Mazda L-series engines in this era.

As part of routine servicing, it’s smart practice to replace the sump plug washer at every oil change. The washer is designed for single use, once crushed, it won’t seal as well a second time and can lead to weeping or drips on the driveway. Mazda’s workshop guidance also notes to install a new gasket and torque the plug correctly—typically in the 30–41 N·m range depending on engine variant—so it seals without risking damage to the aluminium sump.

Owners who service at home should keep a couple of genuine-spec M14 washers on hand. Avoid generic rubber-coated washers and don’t use sealants on the threads, a fresh crush washer and proper torque is the correct solution. If a washer is reused, watch for tell-tales like a fresh oil film around the plug after a drive, or a spot under the car the next morning.

• Always fit the correct-size M14 aluminium (or copper) crush washer.
• Clean the plug and sump sealing faces before refitting.
• Tighten with a torque wrench to the workshop spec (around 30–41 N·m).
• Replace the washer at every oil change (time or kilometres, whichever comes first).
• If the plug has been overtightened previously, inspect threads and replace the plug if needed.

Technical references consulted: Mazda Premacy/Mazda5 (CR) Workshop Manual, Engine Lubrication section, Mazda Electronic Parts Catalogue (2010 MY), listing “Gasket—Oil Pan Drain Plug (M14)”, AU/NZ aftermarket fitment guides that list M14 crush washers for the 2010 Premacy.

What size washer does a 2010 Mazda Premacy use?
This model uses an M14 crush-type sump plug washer, commonly aluminium. Dimensions can vary slightly by brand, so choosing a Mazda-genuine or reputable aftermarket M14 washer made for Mazda L-series engines is the safest bet.

How often should the sump plug washer be replaced?
Replace it at every oil change. It’s a single-use crush washer, reusing it raises the chance of slow leaks. If in doubt, fit a new one—it’s inexpensive insurance against drips.

What torque should the sump plug be tightened to?
Mazda workshop guidance for the Premacy/Mazda5 specifies tightening the oil drain plug with a new washer to roughly 30–41 N·m, depending on the exact engine. Using a torque wrench helps avoid both leaks and stripped threads.