Parts for your 2022 Subaru Impreza-Exhaust gasket

2022 Subaru Impreza exhaust-gasket: what it does and when to replace it

Yes, the 2022 Subaru Impreza uses exhaust gaskets. Subaru’s workshop manual for the MY22 Impreza (FB20 engine, Exhaust section) specifies metal manifold-to-head gaskets and crush-ring (donut) gaskets at the front pipe joints. Subaru’s parts catalogue for this model lists multiple exhaust gaskets at the manifold, front pipe and flange connections, and independent repair references covering late-model Impreza/FB-series engines describe the same gasket types and service steps. So an exhaust-gasket is absolutely relevant on a 2022 Subaru Impreza.

On this Impreza, exhaust gaskets seal the joins where hot gases would otherwise leak — mainly at the cylinder head to manifold, the manifold/front pipe, and various flanged sections rearward. The manifold gasket is typically a multi-layer steel design to cope with heat cycles, while the front pipe uses a crush-type donut to maintain a gas-tight seal even as the springs and joints flex with engine movement.

Why it matters? A tight seal keeps the car quiet, protects against fumes creeping into the cabin, and lets the oxygen sensors read cleanly so the ECU can manage fuel trims and emissions. A leaking gasket can cause a sharp ticking on cold start, a sooty mark around a joint, a whiff of exhaust under the bonnet, higher fuel use, and even an emissions fault code.

Replacement isn’t a routine service item, but it’s strongly recommended any time a joint is disturbed. On the 2022 Impreza that usually means fitting new manifold gaskets and a fresh donut gasket when removing the front pipe. Use quality OEM-equivalent parts, clean the mating faces, follow the proper torque pattern on the manifold, and renew the spring bolts and hardware where specified. A dab of high-temp anti-seize on studs (not on gasket faces) helps the next tech. Always refit O2 sensors carefully and check for leaks once hot.

Good practice at each service:

• Listen for ticks or chuffs on start-up.
• Look for soot tracks at flanges and the donut joint.
• Check rubber hangers and the flex section so extra movement doesn’t stress the gaskets.

Many gaskets last well past 100,000 km, but age, corrosion or a minor knock can change that. If there’s any hint of a leak, it’s worth sorting quickly for comfort, safety and to keep the Impreza running sweet as.

Popular questions about 2022 Subaru Impreza exhaust-gasket

How can someone tell if the exhaust-gasket is leaking on a 2022 Impreza?
Common giveaways are a ticking or puffing noise at cold start, a hiss under light throttle, a faint exhaust smell near the engine bay, or black soot around a flange. An exhaust leak ahead of the O2 sensor can also trigger fuel-trim or catalyst efficiency codes.

Do exhaust gaskets need regular replacement as part of servicing?
They’re not a scheduled item. Replace them when a joint is undone, when there’s clear leak evidence, or if hardware is corroded. Using new gaskets and the correct spring-bolt kits on the front pipe helps maintain a proper seal.

Is it safe to drive with a leaking exhaust-gasket?
It’s not ideal. Exhaust leaks can allow fumes into the cabin and skew O2 readings, which can upset fuel control and emissions. Short trips to a workshop are usually fine, but it’s best to repair promptly.