Parts for your 2018 Nissan Serena-Exhaust mount

2018 Nissan Serena exhaust mount: purpose, checks, and replacement

Technical sources, including the Nissan Serena C27 service manual (Exhaust System section) and Nissan’s FAST electronic parts catalogue, list rubber exhaust mounting insulators/hangers for the 2018 Serena. That confirms an exhaust mount is fitted and relevant to this model (both petrol and e-POWER variants).

On the 2018 Nissan Serena, the exhaust mount (often called a rubber hanger or insulator) keeps the exhaust system securely positioned while isolating vibration from the cabin. Sitting between the exhaust brackets and the vehicle’s underbody hangers, these tough rubber pieces let the exhaust move slightly as the engine rocks and the body flexes, preventing metal-to-metal contact, rattles, and premature cracking of pipes and welds. Good mounts also preserve alignment, so the tailpipe clears the bumper and heat shields, and the system doesn’t knock over speed bumps or on rough Kiwi and Aussie roads.

As part of routine servicing, exhaust mounts are a simple but important visual check. Heat, age, road grime, and coastal conditions can harden or crack the rubber. Tell-tale signs of tired mounts include a droopy tailpipe, a muffler sitting off-centre, dull thuds over bumps, tinny rattles at idle, or more vibration felt in the cabin. If the Serena has seen plenty of kilometres, towing, or gravel-road touring, the mounts deserve an extra look.

Replacement is straightforward and usually done on condition rather than by a strict interval, though many owners find mounts last 5–8 years. It’s smart to replace them in pairs or as a small set near the rear muffler to keep the system balanced. A dab of silicone spray helps slide the old rubbers off and the new ones on. Always support the exhaust with a jack stand before removing any mount, avoid twisting the flex joint, and recheck clearances around the subframe, bumper, and heat shields. After fitting, a quick road test over a few bumps will confirm there are no knocks or rattles. Given the modest cost of the parts, staying ahead of wear can save the Serena from cracked welds or a stressed catalytic converter later on.

• Service tip: inspect mounts every service (10,000–15,000 km), and sooner if there’s a rattle or the tailpipe looks low.
• If one mount has failed completely, check nearby mounts and brackets for strain or tearing.

Popular questions about 2018 Nissan Serena exhaust mounts

How often should exhaust mounts be replaced?
There’s no fixed interval, they’re replaced on condition. Many last 5–8 years, but heat, load, and climate matter. Inspect at each service and replace if cracked, perished, or sagging.

What are the symptoms of a worn exhaust mount?
Common signs include a drooping or off-centre tailpipe, rattles at idle, dull thuds over bumps, and more vibration in the cabin. Visual cracks in the rubber are a giveaway.

Is it safe to drive with a broken mount?
Short distances may be possible, but it’s not ideal. A loose exhaust can knock against the body, stress joints, or damage the catalytic converter. It’s best to sort it promptly.