Parts for your 2017 Lexus Is-Steering rack

2017 Lexus IS Steering Rack — Purpose, Care and When to Replace

Yes, a steering rack is fitted to the 2017 Lexus IS. Lexus technical documentation specifies a rack-and-pinion Electric Power Steering (EPS) unit mounted on the front subframe. This is identified in the Lexus IS (2017) Repair Manual under Steering — Electric Power Steering (EPS) — Steering Gear (rack-and-pinion type), backed by the Lexus/Toyota parts catalogue listing “Gear Assembly, Steering,” and the Owner’s Manual descriptions of the EPS system. These technical sources confirm the steering rack is relevant and used on this model.

On a 2017 Lexus IS, the steering rack converts the driver’s steering wheel input into precise movement of the front wheels. It’s an EPS setup, so the assist comes from an electric motor integrated with the rack rather than a hydraulic pump. That means crisper response, better fuel economy, and no power steering fluid to change. The rack also works hand-in-glove with the car’s safety systems — stability control, lane features and the steering angle sensor all depend on the rack being tight and correctly calibrated.

As part of routine servicing, a quick steering-rack check goes a long way. A technician should:

• Inspect rack boots (bellows) and clamps for splits, grease seepage or damage.
• Check inner and outer tie rod ends for play and split dust covers.
• Listen for clunks or knocks over bumps and feel for notchiness at parking speeds.
• Scan the EPS for fault codes and confirm the steering angle sensor reading is centred.

Because it’s electric, there’s no fluid service, but alignment matters. If the IS starts to wander, feels vague on-centre, or the steering wheel doesn’t sit straight, it’s time for a wheel alignment and a fresh look at the rack and tie rods. Uneven tyre wear at the inside or outside shoulders can also point to wear in the inner tie rods or a bent rack.

Replacement is not a scheduled item — many racks last well beyond 150,000 km if boots are intact and tyres are kept aligned. If the rack develops excess play, persistent knocking, heavy steering with an EPS warning, or contamination inside the boots, replacement or overhaul is on the cards. A proper job on a 2017 IS includes: removing and refitting the rack to spec, replacing inner/outer tie rods if worn, a precise wheel alignment, and an electronic zero-point calibration of the steering angle sensor so the safety systems behave as they should. Done this way, the car steers straight and true, and the EPS assist feels factory-fresh.

Popular questions about 2017 Lexus IS steering racks

How long should the steering rack last on a 2017 Lexus IS?
With regular checks and intact rack boots, many racks see well over 150,000 km. Driving conditions matter — lots of potholes, kerb knocks or big wheel/tyre setups can shorten that lifespan. There’s no set change interval, condition-based inspection at each service is the go.

What symptoms suggest the rack or tie rods are worn?
Tell-tales include front-end clunks over speed humps, looseness or free play at the wheel, a steering wheel that won’t stay centred, or uneven tyre wear. On EPS cars, a steering warning light or heavy/patchy assist at low speed is a red flag. Any of these warrant a rack and linkage check.

Do I need an alignment and calibration after a rack replacement?
Absolutely. A four-wheel alignment is essential, and the steering angle sensor needs a zero-point calibration with a scan tool so stability control and lane features work correctly. Skipping these steps can leave the car pulling, with warning lights or odd steering behaviour.