Parts for your 2015 Mitsubishi Asx-Exhaust gasket

2015 Mitsubishi ASX exhaust gasket — what it does and when to replace it

Technical sources confirm the 2015 Mitsubishi ASX is fitted with exhaust gaskets. The Mitsubishi Motors Service Manual for ASX/Outlander Sport (2010–2017), Group 15A – Exhaust System, specifies gaskets at key joints and directs replacement when disturbed. The MMC ASA Electronic Parts Catalogue (EPC) for GA-series ASX models also lists multiple items, including the exhaust manifold gasket and front exhaust pipe “donut” gasket. So yes, an exhaust gasket is relevant and used on this vehicle.

On the 2015 ASX, exhaust gaskets seal the joins that carry hot gases from the engine to the tailpipe. Typical locations include the cylinder head to exhaust manifold (a multi‑layer steel gasket), the manifold/catalyst outlet to the front pipe (a spring‑bolted donut gasket), and flat/flange gaskets further down the system. Diesel variants with a turbocharger also use gaskets at the turbo to downpipe joint. These seals keep the system quiet, prevent fumes entering the cabin, protect oxygen sensor readings, and help the engine maintain smooth performance and fuel economy.

While exhaust gaskets aren’t a routine replacement item by time or kilometres, they’re considered “replace on removal” parts in factory procedures. During servicing of a 2015 Mitsubishi ASX, workshops typically inspect the exhaust for leaks, damage, and soot marks at joints. If a section is removed or loosened, new gaskets are installed on reassembly to avoid leaks.

• Common leak clues: a ticking or hissing on cold start, exhaust smell around the front of the car, black soot at a flange, drone or raspy note, poor fuel economy, or engine lights linked to lean mixture or O2 sensor faults.
• When replacing: always fit new gaskets, new spring bolts where specified, and torque fasteners to the service manual spec. Check studs for corrosion and replace if stretched or seized.

Good practice includes cleaning mating faces, correctly seating the donut gasket, and evenly tightening hardware. Avoid generic sealants upstream of the catalytic converter, as they can contaminate oxygen sensors. If the vehicle has bottomed out, struck a speed bump, or had a towbar/exhaust change, it’s smart to recheck the joints. Many workshops roll this inspection into regular services or at around 60,000 km intervals, especially on vehicles driven long distances or on rough roads.

Technical confirmation: Mitsubishi Motors Service Manual (ASX/Outlander Sport 2010–2017), Group 15A – Exhaust System, Mitsubishi Motors MMC ASA Electronic Parts Catalogue (GA-series ASX), listing exhaust manifold and pipe gaskets.

Popular questions

Does the 2015 ASX have an exhaust gasket?
Yes. Factory documentation lists multiple exhaust gaskets, including the cylinder head to manifold gasket and the front pipe donut gasket. They’re designed to be replaced when disturbed to keep the system sealed and quiet.

What are the signs an exhaust gasket is failing on a 2015 ASX?
Owners often notice a ticking or hissing at start‑up, a sharper exhaust note, black soot at a flange, or a whiff of exhaust under the bonnet. In some cases the ECU logs mixture‑related or O2 sensor codes due to false air entering the system.

How often should the exhaust gasket be replaced?
There’s no fixed interval. It’s replaced if a joint is undone or if there’s evidence of a leak. During routine servicing, technicians inspect the joins, if any are compromised, new gaskets and hardware are fitted according to the service manual.