Parts for your 2013 Toyota Mark x-Power steering pump

2013 Toyota Mark X power-steering-pump: do you need one?

For the 2013 Toyota Mark X (GRX130/GRX133), a traditional hydraulic power-steering pump isn’t used. Toyota’s own technical literature for the GRX130/133 platform lists Electric Power Steering (EPS) for the steering system, not a hydraulic setup. This is reflected in Toyota repair manuals for the steering section (EPS type), Toyota’s 2012 Mark X product brief released at the minor-change update, and the Toyota Electronic Parts Catalogue for GRX130/133, which shows an EPS rack/column assembly and no belt-driven power-steering pump, hoses or fluid reservoir.

Because it runs EPS, the Mark X doesn’t need a power-steering pump. Assist is provided by an electric motor and ECU on the rack/column, so there’s no hydraulic fluid to leak, no pump to belt-drive off the engine, and no pressure lines to service. This design trims parasitic load on the V6, helps with fuel efficiency, and lets the car fine-tune steering feel by speed. It also simplifies servicing—there’s no power-steering fluid to check under the bonnet and no pump to replace as a wear item.

What should Mark X owners look after instead? The EPS system depends on a healthy 12‑volt supply and proper steering geometry. That means:

• Keep the battery and charging system in good nick, low system voltage can make the steering feel heavy or trigger EPS warnings.
• Check tyre pressures and wheel alignment, incorrect toe or a binding joint can mimic steering faults.
• If the steering ever feels notchy or the EPS light pops up, have the car scanned with Toyota Techstream for steering ECU and torque-sensor codes rather than chasing a non‑existent pump.
• Avoid blasting connectors on the steering rack/column with high-pressure water.

If someone’s trying to sell a “2013 Mark X power-steering pump”, it’s likely a mix-up with the earlier GRX120 series or another model. For GRX130/133 owners, ordering or servicing a hydraulic pump isn’t applicable because the car simply doesn’t use one.

Technical sources referenced: Toyota Mark X GRX130/133 steering repair manual (EPS section), Toyota product information released at the 2012 minor change for Mark X noting EPS fitment, and Toyota Electronic Parts Catalogue entries for GRX130/133 showing EPS components and no hydraulic pump assembly.

Popular questions about 2013 Toyota Mark X power-steering-pump

Does a 2013 Toyota Mark X have a power-steering pump?
No. The GRX130/133 Mark X uses Electric Power Steering, so there’s no hydraulic pump, reservoir or fluid lines. Assist comes from an electric motor controlled by a steering ECU.

Where do I check or top up power-steering fluid on a 2013 Mark X?
There’s nothing to top up—there’s no hydraulic fluid in the EPS system. If the steering feels heavy, don’t add ATF, have the battery/alternator checked and scan the EPS for fault codes.

Why does my 2013 Mark X steering feel heavy sometimes?
Common culprits are low battery voltage, charging issues, incorrect tyre pressures or alignment, or an EPS sensor/motor concern. A workshop with Toyota Techstream can read EPS codes and confirm if the issue is electrical or mechanical.