Parts for your 2019 Nissan Pathfinder-Manifold gasket

2019 Nissan Pathfinder manifold-gasket: what it does and when to replace it

Based on technical sources including the Nissan Electronic Service Manual (ESM) for the 2019 Pathfinder R52 (Engine Mechanical – Intake/Exhaust sections) and Nissan’s parts catalogue for the VQ35DD 3.5‑litre V6, a manifold-gasket is absolutely fitted to this vehicle. It uses intake manifold gaskets (moulded rubber O‑ring style seals between the upper/lower intake pieces and throttle body) and exhaust manifold gaskets (multi‑layer steel type) to keep everything sealed and running right.

On the 2019 Nissan Pathfinder, the manifold-gasket’s job is to seal the mating surfaces so air, fuel, and exhaust gases stay exactly where they should. Intake manifold gaskets keep unmetered air out, so the engine doesn’t run lean or idle rough. Exhaust manifold gaskets stop hot gases and noise from leaking under the bonnet, protecting nearby components and keeping oxygen sensor readings steady so the tune stays crisp.

There’s no set replacement interval in the service schedule, but these gaskets are wear items. A smart approach is to renew the intake manifold gaskets any time the upper intake is removed—such as when doing spark plugs, PCV service, or injector work—so it all goes back together leak‑free. Exhaust manifold gaskets are normally replaced only when the manifold comes off for repair or if a leak is diagnosed.

• Common signs of an intake leak: rough or high idle, hissing noise, lean codes (P0171/P0174), poor fuel economy, or a whistle on light throttle.
• Common signs of an exhaust leak: ticking on cold start that softens warm, exhaust odour in the cabin, sooty marks near the manifold, or louder than usual note.

Service tips for a fuss‑free job on a Pathfinder manifold-gasket:

1. Use quality OEM‑spec gaskets