Parts for your 2017 Mitsubishi Asx-Exhaust gasket

2017 Mitsubishi ASX exhaust gasket — what it does and when to replace it

Referencing the Mitsubishi Motors service manual (Group 15: Exhaust System) and the Mitsubishi ASA/ASA-CAPS electronic parts catalogue for the ASX/RVR/Outlander Sport (GA-series), the 2017 Mitsubishi ASX is fitted with multiple exhaust gaskets. These include the exhaust manifold-to-cylinder head gasket, and flange or “donut” gaskets at the front pipe/catalyst and intermediate joints. Aftermarket catalogues from major exhaust suppliers also list ASX-specific gaskets, confirming fitment across common 2.0L petrol (4B11) and applicable diesel variants. So, yes — an exhaust gasket is relevant and used on the 2017 ASX.

The exhaust gasket’s job is straightforward: seal hot exhaust gases so they don’t leak out at joints and flanges. On the ASX, that means keeping things tight between the manifold and head, and at pipe connections further down. A good seal maintains quiet operation, correct oxygen sensor readings, and efficient catalyst performance. If a gasket leaks, the owner may hear a ticking on cold start, smell exhaust near the bay, or notice soot at a flange. Pre-cat leaks can upset fuel trims, throw a light, and cost a few extra dollars in fuel over a long run.

There’s no set service interval for exhaust gaskets on the ASX, they’re generally replaced when disturbed or if a leak is found. Best practice when servicing or modifying the exhaust is to install new gaskets and hardware rather than reusing old, crushed pieces. A technician should:

• Inspect for black soot, audible ticking, and whistling under load, especially around the manifold and front pipe.
• Use quality OEM-equivalent gaskets and spring-bolt kits where specified (common at donut-style joints).
• Follow the workshop manual torque sequence for the manifold and flanges, tightening from the centre out on the manifold.
• Check mating surfaces for warping and clean old residue carefully, avoid smearing sealant where O2 sensors could be contaminated.
• Apply appropriate high-temp anti-seize to exhaust fasteners as advised, and recheck for leaks after heat cycling.

If the ASX is used for frequent short trips, towing, or sees a lot of coastal or gravel-road driving, it’s smart to have exhaust joints checked during regular servicing. Gaskets are inexpensive compared with the wasted fuel, fumes in the cabin, or a cracked manifold that can follow a long-ignored leak.

Popular questions about 2017 Mitsubishi ASX exhaust gaskets

What are the signs my ASX’s exhaust gasket is leaking?
Common giveaways are a sharp ticking on cold start that softens as it warms, a faint exhaust smell under the bonnet or near the front floor area, visible soot around a flange, and sometimes a slight drop in fuel economy. If it’s ahead of the catalytic converter, the check engine light may appear due to skewed O2 readings.

Can I keep driving with a leaking exhaust gasket?
It’ll usually still run, but it’s not ideal. Leaks can let fumes into the cabin, affect sensor feedback, and over time can erode flanges or studs, turning a small, cheap fix into a bigger job. It’s best to book it in promptly.

How much does replacement typically cost in Australia or New Zealand?
For a single flange or donut gasket with hardware, a workshop job might land roughly in the low hundreds depending on seized hardware. A manifold gasket is more involved and can push higher due to labour. Prices vary with engine, condition of studs, and local rates.