Oil Pump for Nissan Maxima (2002-2008) 3.5L

Direct-Fit Oil Pump Kit for 2002-2008 Nissan Maxima (A33 / A34)

What it Does: The oil pump delivers continuous, regulated lubrication to critical journal bearings and valve gear on the 2002-2008 Maxima to prevent hydrodynamic breakdown and maintain oil pressure.

The Stock Nissan Maxima Lubrication Weakness

High-mileage VQ35DE engines frequently suffer from internal wear within the front-cover-mounted gerotor oil pump. Over repeated thermal cycles, the factory rotor gear faces and inner housing walls experience micro-abrasion, increasing axial and radial clearances. Additionally, fatigue in the stock pressure relief valve spring leads to pressure bleed-off at idle. This progressive loss of hydrodynamic pressure risks rod bearing starvation, cam journal galling, and erratic operation of the variable timing (VTC) sprockets.

The Engineering Solution

Engineered to exact OEM dimensional tolerances, this oil pump assembly restores factory oil volume and hydraulic stabilization across the entire RPM range. Featuring precision-sintered gerotor gears housed within a rigid die-cast casing, it resists internal deflection and wear under sustained load. The unit incorporates a refreshed pressure relief assembly to guarantee consistent line pressure. The included high-temperature gasket and front crankshaft seal prevent front-cover fluid migration and protect against vacuum drop during cold starts.

What's Included

• 1 Oil Pump Assembly
• 1 Crankshaft Front Oil Seal / Gasket
• 1 O-Ring

Technical Specifications

Compatibility

• 2002-2003 Nissan Maxima 3.5L V6 (VQ35DE / A33B Chassis)
• 2004-2008 Nissan Maxima 3.5L V6 (VQ35DE / A34 Chassis)

Frequently Asked Questions & Fitment Warnings

Does this fit the A33 and A34 Maxima?

Yes, this is a direct fit for the 2002-2008 Nissan Maxima equipped with the VQ35DE engine.

Do I need to prime the oil pump prior to first engine startup?

Yes, pre-lubricating the gerotor cavity with clean engine oil or assembly lube before installation is mandatory to establish immediate vacuum and prevent dry-start friction wear.

The Nissan VQ Caliber

The high-revving VQ35DE demands uncompromising fluid delivery across its microfinished bearing journals; replacing a tired pump ensures your powertrain retains factory-rated durability and smooth high-RPM performance.