Parts for your 2020 Subaru Legacy-Engine mount

2020 Subaru Legacy engine mount — what it does and when to replace it

The 2020 Subaru Legacy absolutely uses engine mounts. Subaru’s factory service information for the 2020 model year Legacy (7th generation on the Subaru Global Platform) and the official Subaru genuine parts catalogue both list left and right engine mount insulators and their brackets for the 2.5‑litre FB25 and 2.4‑litre turbo engines. These sources confirm engine mounts are fitted and serviceable items on this vehicle.

On this model, the engine mounts secure the boxer engine to the front subframe while isolating noise, vibration, and harshness. They keep driveline geometry true so the CVT and symmetrical AWD stay smooth and reliable, particularly under hard acceleration, braking, and over rough Kiwi and Aussie roads. Most mounts are fluid-filled rubber insulators tuned to soak up idle shimmy and road buzz without letting the engine lurch about under the bonnet.

There’s no fixed replacement interval, but engine mounts should be inspected as part of major servicing—think around 50,000–60,000 kilometres—and anytime there’s a driveline clunk or extra vibration. Heat, oil contamination, and age can crack the rubber or cause fluid‑filled mounts to leak, which ramps up cabin vibration.

• Common signs they’re tired:
  • Noticeable vibration at idle in Drive that eases in Neutral
  • Thump or knock on take‑off, gear engagement, or over speed humps
  • Excessive engine movement when the throttle is blipped
  • Visible cracking, collapsed rubber, or oily residue on the mount

When replacement’s due, best practice is to use quality OEM‑spec mounts and address mounts in pairs if wear is similar. A workshop will support the engine from underneath (never against the sump), remove the mount brackets, swap the insulators, and torque everything to Subaru spec with the engine settled at normal ride height. It’s a tidy 1.5–3.0 hour job per side depending on corrosion and access. After fitment, expect a smoother idle, sharper shifts, and fewer drivetrain bangs—especially noticeable on hills and with a loaded car.

• Helpful tips:
  • Inspect for oil leaks first—oil on a mount shortens its life
  • Check the transmission mount at the same time
  • A post-repair road test for vibration and a quick fastener recheck after a few hundred kilometres is smart

Technical sources referenced: Subaru Technical Information System (STIS) 2020 Legacy Service Manual — Engine Mounting, Subaru Genuine Parts Catalogue for 2020MY Legacy.

Popular questions about 2020 Subaru Legacy engine mounts

How long do engine mounts last on a 2020 Legacy?
There isn’t a set lifespan, but many last well past 120,000 kilometres. Driving conditions, heat, and fluid leaks make a big difference. If the car sees lots of stop‑start or rough roads, expect earlier wear. Regular inspections during major services help catch issues before they get noisy.

Can worn mounts damage other components?
Yes. Excess engine movement can stress exhaust flex joints, hoses, and wiring, and it can make the CVT and AWD feel harsh. Replacing weak mounts restores alignment and reduces shock loads through the driveline, which is kinder to everything attached to the engine.

Is it a DIY job or workshop work?
With proper support gear and torque specs, a skilled DIYer can tackle it. That said, access can be tight and supporting the engine safely is critical. Most owners will be better off having a trusted workshop handle the swap and confirm the result with a road test.