Nissan 1229631U20 — Retainer Assy-Oil Seal, Rear
Overview
Rear crankshaft oil seal retainer Nissan 1229631U20 secures the main rear crankshaft seal against the engine block rear face, preventing engine oil leaks into the flywheel housing. Manufactured from die-cast aluminium alloy, this housing resists thermal distortion up to +150 °C. The unit features 6 mounting holes sized M6x1.0 and a precision-machined inner seal recess measuring 90 mm in diameter. OEM part references include 1229631U20, 12296-31U20, and 12296-31U00. The component mounts directly onto the cylinder block sealing surface using standard RTV silicone gasket compound or pre-cut paper gasket interfaces.
This rear seal housing fits Nissan Maxima A32 and A33 models built between 1994 and 2006, Nissan Cefiro A32 and A33 models built between 1994 and 2003, and Nissan Pathfinder R50 models built between 1995 and 2004. It also fits Infiniti I30 models built between 1996 and 2001, alongside Infiniti QX4 JR50 models built between 1996 and 2003. Compatible engine applications include 2.0L VQ20DE, 3.0L VQ30DE, and 3.5L VQ35DE V6 petrol power units. Replacement is required when the aluminium casting develops fatigue cracks, warped mating surfaces from engine overheating, stripped thread bores, or corrosion across the gasket mating flange during major engine overhauls.
Nissan 1229631U20 — retainer assy-oil seal, rear. 5 offers available, starting from 51.34 USD.
Specifications
Manufacturer — Nissan. Article number — 1229631U20. Name — Retainer Assy-Oil Seal, Rear. Offers — 5. From — 51.34 USD.
Compatible cross-references
Replacements and analogues: Nissan 1229631U10, Nissan 1229631U11, Nissan 1229631U15, Nissan 1229631U10, Nissan 1229631U11, CORTECO 19033853B, MUSASHI N2359, NTY NUPNS028, Autokat 1229631U20, AUTOKAT 1229631U20.
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