Parts for your 2007 Mazda Cx-9-Oil seals

2007 Mazda CX‑9 oil seals — what they do and when to replace them

Technical sources including the 2007 Mazda CX‑9 Workshop Manual (Engine and Automatic Transaxle/Transfer sections) and Mazda’s Electronic Parts Catalogue show this model uses several oil seals: front and rear crankshaft oil seals, transaxle/drive shaft oil seals, and—on AWD models—power transfer unit (PTU) and rear differential oil seals. So, oil‑seals are absolutely fitted to the 2007 CX‑9 and are relevant to routine servicing decisions.

Oil seals keep engine oil, transmission fluid and diff oil where they belong, while keeping grit and moisture out. On a CX‑9, they work hard around rotating shafts—the crank, cam ends, drive shafts and output stubs. When they age or harden, they can mist, weep or leak, leading to low fluid levels, clutch or belt contamination, and that burnt‑oil odour under the bonnet. Left too long, a minor seep can turn into a messy, costly repair.

They’re not a scheduled replacement item like filters