Parts for your 2021 Mazda 3-Steering rack

2021 Mazda 3 steering rack: what it does, and how to look after it

The 2021 Mazda 3 is fitted with a steering rack. Technical sources confirm this: the Mazda Workshop Manual for the BP-series Mazda3 (2019–2023) lists an electric rack-and-pinion steering gear integrated with an EPS motor and control module, Mazda Australia’s model specifications state Electric Power-Assisted Steering (EPAS), which operates a rack-and-pinion, and genuine parts catalogues for the BP Mazda3 carry “steering gear (rack & pinion)” assemblies and tie rods for this model.

What does the rack actually do? In simple terms, the steering rack converts the driver’s steering wheel input into the sideways movement that turns the front wheels. On the 2021 Mazda 3, it’s an electric rack, so assistance comes from an electric motor on the rack rather than hydraulic fluid. That brings crisp steering feel, better efficiency, and fewer fluid-related hassles.

Because it’s an electric unit, there’s no power steering fluid to top up or flush. Routine care is mostly about inspection and alignment. During scheduled servicing, a good workshop will check for play in the inner and outer tie rods, inspect the rack boots for splits and grease contamination, listen for knocks over bumps, and scan the EPS for fault codes. If the steering wheel sits off-centre or the car wanders, a wheel alignment should be carried out and the steering angle “centre” confirmed with a scan tool.

Replacement is typically only needed if there’s internal wear, persistent noise/clunking, impact damage, or an EPS fault that can’t be repaired. When tie rod ends or the rack are replaced, it’s essential to:

• Perform a four-wheel alignment (toe will change as soon as a tie rod is disturbed).
• Calibrate the steering angle/EPS using a suitable scan tool (Mazda IDS/MDARS or equivalent).
• Torque all fasteners to spec and replace any single-use hardware as specified by the workshop manual.

Common symptoms that deserve attention include heavier-than-normal steering, a notch or dead spot around centre, knocking over small bumps, uneven tyre wear, or an EPS warning lamp. Left alone, minor play can accelerate tyre wear and affect braking stability, so it’s worth sorting early.

For most owners, the sweet spot is simple: keep an eye on tyre pressures, book regular inspections, and jump on any steering noises or alignment quirks promptly. The 2021 Mazda 3’s electric rack is a tough unit, and with periodic checks, it should deliver that tidy Mazda steering feel for many kilometres.

Does the 2021 Mazda 3 have a steering rack?

Yes. The BP-series 2021 Mazda 3 uses an electric rack-and-pinion steering gear with an integrated EPS motor and control module, as described in the Mazda Workshop Manual and reflected in Mazda parts catalogues and specifications.

Is there any power steering fluid to change on a 2021 Mazda 3?

No. It’s an electric power-assisted system, so there’s no hydraulic fluid. Focus on inspections, alignments, and EPS diagnostics if a warning light appears or the steering feels odd.

When should the steering rack or tie rods be replaced?

Replace parts if there’s play in the inner/outer tie rods, the rack knocks or binds, the steering won’t centre properly, or an EPS fault persists after diagnosis. Always follow up with a wheel alignment and steering angle/EPS calibration.