Parts for your 2020 Subaru Xv-Manifold gasket

2020 Subaru XV manifold gasket: what it is, why it matters, and when to replace it

Per Subaru’s own technical literature, a manifold gasket is absolutely used on the 2020 Subaru XV (Crosstrek). The 2020 MY Subaru Service Manual for the FB20D engine details intake manifold and exhaust manifold removal/installation procedures that specify replacing the respective gaskets. The Subaru FAST electronic parts catalogue for the 2020 XV also lists intake manifold gaskets and exhaust manifold gaskets for FB20D and e-BOXER variants. Those factory sources confirm the part is relevant and fitted to this vehicle.

On the XV’s 2.0‑litre boxer, manifold gaskets seal the joints where the intake manifold meets the cylinder heads and where the exhaust manifold (headers) bolt up. Their job is simple but critical: keep unmetered air out of the intake, and hot exhaust gases inside the exhaust. If an intake gasket leaks, the engine can run lean, idle roughly, or throw fault codes. If an exhaust gasket leaks, expect a ticking noise on cold start, a whiff of fumes, possible soot around the flange, and skewed oxygen sensor readings.

They’re not a scheduled replacement item in normal servicing, but smart maintenance goes a long way. Any time the manifolds are off—say for plugs, injector work, or a major service—new OEM-spec gaskets should go in. Reusing crushed or heat-cycled gaskets is false economy.

• Tell-tales of intake leaks: hissing under the bonnet, rough idle, higher fuel use, or lean codes like P0171/P0174.
• Tell-tales of exhaust leaks: ticking on cold start, exhaust smell in the engine bay, or black sooty marks near the manifold flanges.

Good workshop practice on the XV includes cleaning mating faces without gouging, checking manifold flange flatness, fitting fresh studs/nuts where applicable, and tightening in the factory sequence to the specified torque. Multi-layer steel gaskets on the FB engine generally don’t need re-torque, but fasteners must be torqued correctly first go. In Aussie and Kiwi conditions, age and heat cycling mean gaskets can harden by the 100,000–200,000 km mark, inspection during major services is wise. If there’s any doubt, replace. It’s a modest parts cost that protects engine performance and keeps things quiet and clean.

For best results, stick with genuine or high-quality equivalents, and have a technician familiar with Subaru boxer layouts handle the job—the horizontal engine’s twin banks mean two intake gaskets and two exhaust junctions to get right.

Popular questions about 2020 Subaru XV manifold gaskets

Does the 2020 Subaru XV have intake and exhaust manifold gaskets?
Yes. The FB20D boxer engine in the 2020 XV uses intake manifold gaskets at the heads and exhaust manifold gaskets at the header-to-head joins. These are specified in the Subaru Service Manual and listed in the Subaru FAST parts catalogue.

How often should manifold gaskets be replaced on a 2020 XV?
There’s no fixed interval. They’re replaced if leaking or any time the manifolds are removed. Many owners will never need them during routine servicing, but by higher mileages or after heat cycling and hardware corrosion, replacement becomes more likely.

What are the signs of a failing manifold gasket on an XV?
Intake side: hissing, rough idle, lean codes, and higher fuel use. Exhaust side: a ticking noise on cold start that softens warm, exhaust smell in the bay, and soot around the flange. Any of these warrant an inspection and likely gasket replacement.