Parts for your 2011 Subaru Forester-Rack boots

2011 Subaru Forester rack-boots: what they do and when to replace them

Based on technical references including the Subaru Forester (SH, 2011) Service Manual – Steering System section and the Subaru FAST electronic parts catalogue, this model uses a hydraulic rack-and-pinion steering gear fitted with bellows-style rack boots on both sides. These flexible boots (also called bellows or gaiters) are listed as service parts and illustrated as protecting the inner tie rods and rack ends.

On a 2011 Subaru Forester, the rack boots keep grit, water, and road grime out of the steering rack and inner tie-rod joints. They also help the rack breathe as it travels left to right, without letting contaminants in. If a boot splits, dust and moisture can chew out the inner joints and rack seals, often leading to play at the wheel, notchy steering, and eventually power-steering fluid leaks from the rack. In Aussie and Kiwi conditions—think corrugations, gravel, and coastal salt—intact boots are especially important.

Good practice is to inspect the boots at every service or roughly every 10,000–15,000 kilometres, and after off-road trips. Look for cracks, oil inside the boot, loose or missing clamps, or a boot that’s twisted. Oil in the boot usually points to a leaking internal rack seal, which needs more than just a new boot.

When replacing a rack boot on this Forester, the usual approach is to remove the wheel, separate the outer tie-rod end from the knuckle, mark the tie-rod thread position to keep toe close, slide off the old boot, and fit a quality replacement with new clamps. Avoid generic zip ties—use proper clamps that won’t loosen. Don’t twist the boot and make sure the breather orientation matches the original. Always tighten components to factory torque specs and book a wheel alignment afterwards, even careful marking can’t guarantee perfect toe. If one boot’s perished, the other side won’t be far behind, so many techs do them as a pair.

Handy signs it’s time: a visible split, grease or oil weeping near the inner tie rod, a faint clunk over bumps, uneven tyre wear, or vague on‑centre feel. In most states and in NZ, a torn steering rack boot can cause a roadworthy/WOF fail, so it’s worth sorting promptly.

• Inspect every service or 10–15,000 km
• Replace in pairs if wear is similar
• Use proper clamps and get an alignment

Popular questions

How can someone tell if the rack boots on a 2011 Forester need replacing?
They should look for cracks, splits, or loosened clamps, and squeeze the boot gently—if it’s brittle or oily inside, it’s on the way out. Any oil inside the boot usually indicates a leaking rack seal rather than just a boot issue.

Can rack boots be replaced without needing a wheel alignment?
It’s best to get an alignment. Marking the tie-rod threads can get it close, but even a small change in toe can cause uneven tyre wear. An alignment is cheap insurance.

Is a torn rack boot a roadworthy/WOF fail?
Usually, yes. Steering components must be protected and free of play. A split boot lets in contaminants, risking steering wear, so most inspectors will fail it until it’s repaired.