Parts for your 2008 Mazda Cx-9-Oil seals

2008 Mazda CX-9 oil-seals: what they do and when to replace them

Oil-seals are absolutely fitted to the 2008 Mazda CX-9. Mazda’s 2008 CX-9 Workshop Manual, the Mazda Electronic Parts Catalogue, and Aisin service information for the AW6A-EL/TF-81SC six-speed automatic all reference multiple seals, including front and rear crankshaft oil-seals and transaxle/transfer output oil-seals. So yes—oil-seals are relevant and critical on this model.

In plain terms, oil-seals keep lubricants in and grit out. On the CX-9’s 3.7‑litre V6 (Cyclone/MZI), engine oil-seals stop engine oil escaping at the crankshaft and cam areas, and the auto trans oil-seals retain transmission fluid around rotating shafts. When they’re healthy, you won’t see drips on the driveway, smell burning oil under the bonnet, or find red ATF weeping around the driveshafts.

Common 2008 CX-9 oil-seals include:

• Front crankshaft oil-seal (behind the harmonic balancer)
• Rear main (crankshaft) oil-seal between engine and transmission
• Camshaft seals (depending on build)
• Automatic transmission input and output/axle oil-seals
• AWD models: transfer/Power Take-Off (PTU) and rear diff pinion oil-seals

Oil-seals aren’t a scheduled replacement item