Parts for your 2015 Mitsubishi Lancer-Exhaust mount

2015 Mitsubishi Lancer exhaust mounts — what they do and how to look after them

Exhaust mounts are absolutely relevant and fitted to the 2015 Mitsubishi Lancer. Technical sources that document this include the Mitsubishi Lancer (CJ/CF) Workshop Manual’s Exhaust System section, the Mitsubishi ASA electronic parts catalogue (EPC) which lists rubber exhaust hanger insulators and brackets for 2015 Lancer variants, and mainstream repair manuals and dealer parts diagrams that show multiple hangers at the front pipe, centre section and rear muffler. These sources make it clear the Lancer’s exhaust is supported and isolated by dedicated mounts.

On the Lancer, exhaust mounts (also called rubber hangers or insulators) suspend the exhaust system from the body so it can move a little without knocking or transferring vibration into the cabin. They carry the weight of the pipes, resonator and muffler, maintain correct clearances to the subframe, suspension and heat shields, and reduce stress on welds, flanges and the catalytic converter. The mounts are usually thick heat‑resistant rubber donuts or blocks paired with steel brackets welded to the exhaust and bolted to the underbody.

Because they cop heat, road grime and coastal air, the rubber hardens, cracks or sags over time. Typical signs on a Lancer include a tailpipe sitting low or off‑centre, a dull thump over bumps, buzzing or rattling at idle, and more exhaust drone than usual. If the exhaust is touching the body, you might even hear a metallic knock on start‑up or when loading the drivetrain.

As part of regular servicing, it’s smart to inspect the mounts every 10,000–20,000 km, or at least once a year. Look for perishing, splits, elongation of the holes, torn rubber, or rusty brackets. Replacement is straightforward: safely support the exhaust, spritz a little silicone spray on the pegs, lever off the old insulator, then slip on a quality OEM‑spec rubber mount. If one has failed or is badly sagged, replace the matching mount on the same section to keep the system level. After refitting, check clearances cold and again after a short drive when the system is hot and expanded. Re‑secure any brackets to factory torque and confirm the oxygen sensor wiring isn’t under tension.

For daily driving in Aussie and Kiwi conditions, stick with rubber mounts. Polyurethane upgrades can be firmer, but they often add noise, vibration and harshness you don’t want in a road Lancer.

• Inspect mounts during every oil service, especially if the car sees lots of short trips or coastal roads.
• Address any rattles early to prevent cracked welds or a broken flex joint.
• Use quality parts, heat‑resistant OEM or equivalent rubber lasts longest.

How many exhaust mounts does a 2015 Lancer have?
Most 2015 Lancer models use around four to five mounts: one near the front pipe/flex joint, one around the centre/resonator area, and two at the rear muffler. Variations depend on engine, body style and whether there’s a centre muffler. A quick look underneath will confirm the exact count on the car in front of you.

What are the common signs an exhaust mount needs replacing?
A droopy or skewed tailpipe, thumps over speed humps, rattles at idle, and extra droning on the motorway are classic clues. If the mount rubber looks cracked, glossy and hardened, or the holes have stretched, it’s time to swap them. If a rattle changes with engine load or when the A/C cycles, also check heat shields and brackets while you’re there.

Can the mounts be upgraded?
Yes, but it’s a trade‑off. Firmer polyurethane hangers can sharpen control of exhaust movement, which some performance drivers like, but they often raise NVH inside the cabin. For a road‑going Lancer, fresh OEM‑style rubber usually delivers the best balance of durability and comfort.