Parts for your 2006 Nissan Maxima-Oil seals

2006 Nissan Maxima oil-seals — what they do and when to replace them

Oil-seals are absolutely fitted to the 2006 Nissan Maxima (A34, VQ35DE). This is confirmed by Nissan’s Factory Service Manual: the Engine Mechanical (EM) section details the front crankshaft oil seal and the rear main oil seal behind the flywheel/flex-plate, while the Transmission/Transaxle (TM/AT) sections specify differential/axle shaft oil seals. Genuine Nissan parts catalogues and common aftermarket catalogues list these seals for the model, so they’re not only relevant — they’re essential to keeping the engine and transaxle sealed and tidy.

On a 2006 Maxima, oil-seals keep engine oil and trans fluid where they belong, preventing leaks around rotating shafts. Typical seals include the front crankshaft seal (behind the harmonic balancer), the rear main seal (between engine and transmission), and the left/right transaxle output (diff) seals where the driveshafts plug in. When these harden with age or cop a nick during work, they can weep or drip, leading to low oil levels, messy undertrays, and that tell-tale burny smell when oil hits the exhaust.

They’re not a scheduled service item by time or kilometres, but they should be inspected at each service. Look for fresh oil around the crank pulley area, between engine and gearbox bellhousing, or flung onto the subframe near the inner CV joints. If there’s dampness that reappears after a clean, budget for a seal replacement.

Practical advice for owners and workshops:

• Front crank seal: a sensible job when the drive belts or harmonic balancer are off. Use the correct seal puller/driver and follow FSM torque specs for the crank bolt.
• Rear main seal: best done when the transmission is already out for other work. Replace the seal and inspect the crank flange and housing for grooves or burrs.
• Transaxle output seals: if there’s oil around the inner CVs, replace seals and check the driveshaft surfaces and snap rings. Top up with the correct spec trans fluid afterwards.
• Sealants and oils: stick to the FSM’s recommended sealants and oil specs