Parts for your 2017 Toyota Prius-Steering rack

2017 Toyota Prius steering rack — what it is and how to look after it

Yes, the 2017 Toyota Prius is fitted with a steering rack. Toyota’s own service information (Repair Manual and New Car Features for the ZVW50/51 series) specifies an Electric Power Steering (EPS) rack-and-pinion steering gear assembly, and the Toyota Electronic Parts Catalogue lists a steering gear assembly for this model year. That means “steering rack” is absolutely relevant to a 2017 Prius.

On this Prius, the steering rack’s job is to turn the driver’s input at the wheel into precise side-to-side movement of the front wheels via the inner and outer tie-rod ends. Because it’s EPS, assistance comes from an electric motor and control unit rather than a hydraulic pump. That setup keeps things efficient, tidy under the bonnet, and there’s no power-steering fluid to leak or change.

Day to day, the Prius rack is largely maintenance-free, but it still deserves a look at service time. A mechanic should inspect the rack boots (gaiters) for splits, check inner/outer tie-rod ends for play, and listen for knocks over bumps or when the wheel’s turned at a standstill. They’ll also eyeball tyre wear and confirm alignment is on the money. If the rack or tie-rods are replaced, plan on a proper wheel alignment and an EPS zero-point/torque sensor calibration with a scan tool so the steering centres correctly and the assistance feels natural.

Replacement is usually considered if there’s binding through the wheel, excessive free play, metallic clunks, uneven or rapid tyre wear that won’t align out, or visible damage from a kerb strike. Water ingress (torn boots) can chew out internal bushes and the rack bar. When fitting a new or remanufactured unit, it’s smart to replace both tie-rod ends, torque all fasteners to spec, and verify there’s no interference at full lock. After any front-end work, a road test and a final alignment check seal the deal.

• Service tip: inspect rack boots and tie-rods every 10,000–15,000 km with routine servicing.
• Warning signs: steering wander, shimmy, uneven tyre wear, or EPS warning light with steering feel changes.
• Good practice: keep tyres matched and pressures right, mis-matched tyres can mask or mimic rack issues.

Looked after properly, the 2017 Prius steering rack delivers light, accurate steering and long, quiet service life on Aussie and Kiwi roads.

Popular questions about 2017 Toyota Prius steering racks

Does the 2017 Prius use power-steering fluid?
No. It uses Electric Power Steering, so there’s no hydraulic fluid or pump. If fluid is seen near the rack, it’s likely engine or transmission fluid from elsewhere, or grease from a damaged boot.

How long should a Prius steering rack last?
With normal driving and intact boots, many go well past 200,000 km. Impacts with potholes or kerbs, torn boots, and neglected alignments are the usual life-shorteners.

Do I need a wheel alignment after tie-rod or rack work?
Absolutely. Any change to the rack or tie-rods alters toe settings. After mechanical alignment, an EPS centre/zero-point calibration with a scan tool keeps the steering wheel straight and the assistance balanced.