Parts for your 2020 Nissan Serena-Exhaust gasket

2020 Nissan Serena Exhaust Gasket — Purpose, Care, and Replacement

Referencing technical sources for the C27-series Serena (2020 model year), an exhaust gasket is indeed fitted and relevant. Nissan’s Electronic Service Manual (ESM) and FAST/EPC parts catalogues for the C27 Serena (MR20DD petrol and e-POWER variants) depict multiple exhaust gaskets: a manifold-to-cylinder-head gasket (catalogue group 14036) and crush-type ring/flange gaskets at the front pipe and muffler joints (catalogue group 20691/20692). Dealer parts illustrations and aftermarket catalogue listings for C27 confirm these sealing points.

On the 2020 Nissan Serena, the exhaust gasket’s job is to keep the exhaust stream sealed as it leaves the engine and flows through the catalytic converter, pipes, and mufflers. That keeps noise down, prevents fumes sneaking into the cabin, and helps the oxygen sensors and emissions gear read accurately. Between the manifold and cylinder head there’s typically a multi-layer steel gasket, while the joins further down the system use a crush “donut” or flat flange gasket. They’re small parts, but they cop high heat, vibration, and condensation, so they do wear.

As part of regular servicing, it’s smart to check for tell-tale signs of a tired exhaust gasket after cold starts and on-road tests:

• A sharp ticking or puffing noise that speeds up with revs
• Sooty marks around a joint, or a whiff of exhaust near the front of the vehicle
• Slight loss of low-end torque or a bung fuel economy reading

If a joint is opened during other repairs (for example, removing the front pipe or catalytic converter), plan on replacing the gasket. Donut/crush gaskets are single-use by design