Parts for your 2016 Toyota Prius-Rack boots

2016 Toyota Prius rack-boots: what they do and when to replace them

Yes, the 2016 Toyota Prius (ZVW50 series) uses rack-boots. Technical sources including the Toyota Repair Manual for the ZVW50 steering section, Toyota’s Electronic Parts Catalogue (which lists a “Boot, Steering Gear” for this model), and general service manuals covering Gen 4 Prius confirm that the car runs an electric power steering rack-and-pinion with bellows-style rack-boots on each side. These flexible boots protect the inner tie rod joints and the rack bar from dust, water and road grime.

On this Prius, rack-boots are essential because there’s no hydraulic fluid to continually flush contamination from the rack—any grit that gets in can chew out the inner tie rod ball sockets and the rack bar coating. The boots also help keep the correct grease where it belongs and allow the rack to move freely by flexing like an accordion without letting the nasties in.

For servicing, it’s smart to inspect the rack-boots at every routine service (about every 10,000–15,000 kilometres) or at least annually if the car does fewer kays. Look for splits, perishing, loose clamps, or grease weeping. If a boot is torn, replace it promptly, driving with a split boot risks premature inner tie rod and steering rack wear. Because this model uses electric power steering, finding oily residue around the boot usually points to grease purge from a worn joint or another nearby leak—there’s no power-steering fluid on this car.

Replacement is straightforward workshop fare: remove the front wheel, disconnect the outer tie rod end, slide off the old boot, clean the rack bar, and fit a quality boot with new one-time clamps. Count the tie rod turns or measure the length before removal, then reassemble and book a wheel alignment—adjusting toe or disturbing the tie rod almost always nudges alignment out. Use OE or reputable aftermarket boots, flimsy universal bellows can kink, trap moisture, or rub through. When installing, avoid twisting the boot, ensure the breather notch/orientation mark is correct, and don’t overpack with grease (follow the repair manual guidance).

• Check both left and right boots at the same time.
• If one is split, consider replacing the pair.
• If water or grit has entered, inspect the inner tie rods for play and the rack for corrosion.

Look after the rack-boots and the Prius’ light, precise steering will stay sweet for years.

Popular questions about 2016 Toyota Prius rack-boots

Do all 2016 Prius models have rack-boots?
Yes. Across the ZVW50-series lineup, the electric power steering rack uses bellows-type rack-boots on both sides. This is documented in Toyota’s Repair Manual steering section and shown in the Toyota parts catalogue under “Boot, Steering Gear”.

How often should rack-boots be replaced?
There’s no fixed interval—replace on condition. Inspect at each service for splits, hardening, or loose clamps. If a boot is damaged or contaminated inside, replace it immediately and check the inner tie rod. Many last well over 100,000 kilometres if not exposed to off-road grit or kerb strikes.

Do I need a wheel alignment after changing a rack-boot?
Almost always, yes. Removing the outer tie rod end or adjusting toe to refit the boot can shift alignment. Even if you count turns, a quick professional alignment is cheap insurance against uneven tyre wear and a crooked steering wheel.