Parts for your 2018 Subaru Impreza-Steering rack

2018 Subaru Impreza Steering Rack — What It Does and How to Look After It

Per Subaru’s technical sources, the 2018 Subaru Impreza absolutely uses a steering rack. The Subaru Service Manual for the 2018MY Impreza (Chassis/Steering) specifies an electric rack-and-pinion steering gear (EPS) mounted to the front crossmember, and the Subaru Genuine Parts Catalogue lists complete “steering gear box (electric)” assemblies (e.g., 34110FL020/34110FL030, variant by trim/EyeSight). Subaru’s STIS diagnostic procedures also cover EPS rack checks and fault tracing. So yes—steering-rack is relevant to this model.

On this Impreza, the steering rack converts the driver’s steering wheel input into precise sideways movement of the tie-rods, turning the front wheels. The integrated electric motor and controller add assist without any hydraulic pump or fluid, helping with crisp response and lighter effort at parking speeds while staying steady on the motorway. A healthy rack keeps the car tracking straight, tyre wear even, and feedback consistent through the wheel.

Because it’s an EPS unit, there’s no power-steering fluid to service. Routine care is mostly about inspection and alignment. At each service interval, a technician should check the rack boots for tears, tie-rod ends for play, and the mounting points for any signs of movement. Electrical connectors to the rack should be clean, secure, and kept dry. Tell-tales that the rack or tie-rods need attention include:

• Notchy, heavy, or inconsistent steering feel
• Clunks over bumps or steering play on centre
• Uneven or rapid tyre wear, pulling, or wandering
• EPS/steering warning light with stored fault codes

If replacement is on the cards, it pays to use a quality new or reman rack that matches the original part number. A few practical pointers:

1. Confirm the fault first: inspect boots, inner/outer tie-rods, column joints, and subframe alignment.
2. Disconnect the battery and secure the steering wheel centred before removal.
3. Measure and record toe or tie-rod lengths to aid reassembly.
4. Torque all fasteners to spec from the Subaru manual, don’t clamp or jack on the rack body.
5. Perform a full wheel alignment afterwards and zero the steering angle with a scan tool, models with EyeSight may require a camera check following alignment.

There’s no set kilometre replacement interval—just keep up with inspections every service, especially if the car sees rough roads. Getting onto issues early usually saves tyres, keeps the Impreza feeling sharp, and avoids bigger bills down the track.

FAQs

Does the 2018 Subaru Impreza use power-steering fluid?
No. It runs an electric power steering rack (EPS), so there’s no hydraulic fluid to check or replace. The assist motor and control unit are built into the rack.

When should the steering rack be replaced?
There’s no fixed kilometre schedule. Replace the rack if there’s play, binding, torn boots letting in grit, abnormal noises, or a steering warning with EPS fault codes. Regular service inspections help catch problems early.

Do you need alignment or calibration after rack work?
Yes. Any time the rack or tie-rods are disturbed, a proper wheel alignment is required. After rack replacement, the steering angle needs zero-point calibration, and cars with EyeSight should have a camera check following alignment.