Parts for your 2017 Subaru Forester-Engine mount

2017 Subaru Forester engine mounts: what they do and how to look after them

Engine mounts are absolutely used on the 2017 Subaru Forester. The Subaru Factory Service Manual for the 2017MY Forester (SJ series) includes a dedicated Engine Mounting section, and Subaru’s electronic parts catalogue for the SJ Forester lists left and right engine mount insulators and the upper pitch stop mount. These technical sources confirm the Forester’s drivetrain is supported by two primary side mounts, a pitch-stop (to control fore–aft movement), and a separate transmission mount.

The job of the engine mount is simple on paper but critical in practice: hold the FB/FA-series engine securely in the subframe, isolate vibration from the cabin, and keep everything aligned under throttle, braking, and over rough roads. On the 2017 Forester, the side mounts are typically hydraulic (fluid-filled) to soak up vibration, while the pitch stop helps tame the rocking motion during take-off and gear changes. When they’re healthy, the car feels smooth at idle and composed on the move, when they’re tired, it can feel buzzy, clunky, or harsh.

They’re not a scheduled service item like oil or filters, but they do wear. Many owners see well over 150,000 km from factory mounts, though turbo models or vehicles often used on corrugated or unsealed roads may age mounts sooner. It’s smart to have them inspected during major services or whenever chasing vibrations.

• Common signs they’re on the way out:
  • Excess vibration at idle or when selecting Drive/Reverse (CVT) or engaging the clutch (manual)
  • Clunks on take-off, lift-off, or during shifts
  • Visible sag, cracks, or fluid weeping from a hydraulic mount
  • Excess engine movement when blipping the throttle with the bonnet up

Replacement is straightforward for a trained technician: support the engine safely, swap the affected mount(s), and torque fasteners to Subaru specifications found in the workshop manual. For best NVH and longevity, many owners stick with genuine or high-quality aftermarket mounts. If one side mount has failed, checking the opposite side and the pitch stop is wise, as they age together. After replacement, expect a calmer idle, cleaner shifts, and fewer cabin buzzes.

• Helpful tips:
  • Address fluid-leaking mounts promptly—performance drops quickly once they’re compromised
  • If you’ve upgraded to stiffer performance mounts (e.g., on an XT), accept a little more cabin vibration
  • Always recheck fastener torque after a brief shakedown drive

How long do engine mounts last on a 2017 Forester?

There’s no fixed interval, but many Foresters see 120,000–200,000 km before noticeable wear. Driving conditions matter: frequent towing, rough roads, spirited driving, or turbo torque can shorten lifespan. Routine inspections during major services help catch issues early.

What are the tell-tale signs a mount has failed?

Look for extra vibration at idle, a shudder when selecting Drive/Reverse, a thunk on acceleration or lift-off, and visible tears or fluid leakage on the mount. Excess engine movement when revving gently with the bonnet open is another giveaway.

Is it safe to keep driving with a worn engine mount?

Short term, it’s usually drivable, but comfort and driveline alignment suffer. Leave it too long and you risk damaging exhaust flex joints, hoses, or even the CVT/gearbox mount. If a mount is leaking or split, plan replacement sooner rather than later.