Parts for your 2019 Mitsubishi Asx-Exhaust gasket

2019 Mitsubishi ASX exhaust gasket: what it does and when to replace it

Yes, the 2019 Mitsubishi ASX uses exhaust gaskets. Technical references including the Mitsubishi Motors Service Manual for the GA2W/GA3W ASX/RVR platform and the Mitsubishi ASA electronic parts catalogue list several exhaust gaskets for this model: a multi‑layer steel gasket between the cylinder head and exhaust manifold, a sealing ring (donut) between the manifold/front pipe, and flat flange gaskets at various joints. Aftermarket fitment catalogues for the ASX confirm the same joint locations. So an exhaust gasket is absolutely relevant on a 2019 ASX.

On this ASX, exhaust gaskets seal the high‑temperature gas path so there’s no escaping noise, fumes, or oxygen that could skew sensor readings. The manifold gasket handles extreme heat and expansion right at the head, while the front pipe donut allows a bit of movement as the system heats and cools. Downstream flange gaskets keep the system quiet and leak‑free around the cat, centre pipe and muffler joins.

There’s no set replacement interval, they’re changed when disturbed or if there’s a leak. The service manual calls for renewing single‑use exhaust gaskets whenever the joint is separated, and tightening fasteners to spec. A good workshop will inspect for sooty stains, sulphury smells, or ticking on cold start during routine servicing.

• Common signs: ticking or puffing noise, exhaust fumes in the cabin, black soot at a joint, harsher note, poor fuel economy, or O2 sensor/mixture faults.
• Good practice: replace studs/nuts if corroded, avoid sealants unless specified, align flanges square, torque in sequence, heat‑shield refitment matters.

For a 2019 ASX, quality OEM or reputable aftermarket gaskets are inexpensive, and replacing them proactively when an exhaust section is removed saves headaches later. Manifold work can be tighter for access and may take longer, but flange and donut gaskets are typically straightforward. Keeping the system properly sealed helps the ASX pass WOF/COF or rego inspections, protects the catalytic converter, and keeps things quiet on the daily commute.

FAQs

Does the 2019 ASX have both a manifold gasket and a front pipe gasket?
Yes. Technical documentation (Mitsubishi ASX/RVR GA2W/GA3W service manual and ASA parts catalogue) shows a multi‑layer steel exhaust manifold gasket at the head, plus a sealing ring (donut) at the manifold‑to‑front‑pipe joint, and flat flange gaskets at downstream joins. Exact part numbers vary by VIN and market, so it’s best to confirm against the vehicle identification.

How much does replacing an exhaust gasket on a 2019 ASX cost?
In Australia or New Zealand, typical retail for a flange or donut gasket is about $20–$80, and a manifold gasket about $50–$150. Labour varies with access: around 0.5–1.0 hours for a flange gasket and 1.5–3.0 hours for a manifold gasket, depending on fastener condition. Seized studs can add time and hardware cost.

Is it safe to drive a 2019 ASX with a leaking exhaust gasket?
It’s not ideal. A small leak may just be noisy at first, but it can draw in oxygen, upsetting O2 sensor readings and fuelling. Fumes can also enter the cabin, which isn’t safe. Prolonged leaks upstream of the cat can overheat or damage it. Best bet: book it in promptly.