Parts for your 2006 Toyota Bb-Power steering fluid

2006 Toyota bB power-steering fluid: is it relevant?

For the 2006 Toyota bB, power-steering fluid isn’t relevant because this model uses an electric power steering (EPS) system rather than a hydraulic setup. Technical references including the Toyota bB (QNC20/QNC21) Repair Manual for chassis and steering, and the Toyota Electronic Parts Catalogue for the same model codes, list an electric column-assist unit with an EPS control module and motor, and do not show a hydraulic pump, fluid reservoir, or pressure hoses. The closely related Daihatsu Materia (the platform twin) is documented with column-type EPS as well, reinforcing the absence of hydraulic components.

Because the bB’s steering assist comes from an electric motor on the steering column, there’s no hydraulic circuit to fill or flush—so no power-steering fluid to check, top up, or replace. This design reduces service complexity, eliminates fluid leaks, and improves efficiency compared with older belt-driven pumps.

For owners, that means any steering maintenance focuses on the electrical and mechanical bits of the EPS system and the general steering hardware, not the fluid. Useful service checks include:

• Battery and charging health: EPS draws notable current. A weak 12 V battery or low alternator output can make steering feel heavier, especially at low speeds.
• Warning lights and fault codes: If the EPS warning lamp comes on, scan for DTCs and follow the diagnostic flow in the Toyota bB (QNC20/21) EPS section of the repair manual.
• Steering column and rack play: Inspect the intermediate shaft, column couplings, and rack ends, check rack boots and wheel alignment.
• Tyre condition and pressures: Underinflated or unevenly worn tyres can mimic heavy steering.

If someone’s expecting to find a “P/S” cap under the bonnet on a 2006 bB, they won’t—there’s no reservoir. If steering effort changes or a light appears on the dash, the best move is to check the battery and charging system first, then have the EPS scanned and the front-end inspected by a tech familiar with Toyota’s EPS systems.

FAQs

Does a 2006 Toyota bB need power-steering fluid?
No. The 2006 bB (QNC20/QNC21) uses electric power steering, so there’s no hydraulic fluid, pump, or reservoir. Toyota’s repair documentation for this model shows an EPS motor and ECU on the steering column instead of hydraulic components.

How should the power steering be maintained on a 2006 bB?
Focus on the electrical and mechanical checks: keep the battery and charging system healthy, inspect the column joints and rack ends, maintain correct tyre pressures, and scan the EPS for codes if a warning lamp appears or steering feels uneven.

My steering feels heavy at parking speeds—could it be low fluid?
Not on this car. There’s no fluid to go low. Heavier feel at low speeds is often due to a weak battery, low alternator output, underinflated tyres, or an EPS fault. Start with a battery/charging test and tyre pressure check, then have the EPS scanned if the issue persists.