Parts for your 2018 Subaru Impreza-Power steering pump

2018 Subaru Impreza power-steering pump: is it fitted?

For the 2018 Subaru Impreza, a traditional hydraulic power-steering pump isn’t fitted. Technical documentation backs this up: the 2018 Impreza Owner’s Manual (Steering section) and the Subaru Factory Service Manual specify Electric Power Steering (EPS) rather than a hydraulic system. Because EPS doesn’t use hydraulic assist, there’s no belt-driven pump, no power-steering fluid reservoir, and no fluid service schedule for this model year.

Why no pump? EPS uses an electric motor on the steering rack to provide assist. This setup cuts parasitic losses from a constantly spinning pump, which helps fuel economy and reduces emissions. It also trims weight and complexity under the bonnet and allows the car’s stability and driver-assist systems to fine-tune steering assist when needed. With fewer moving parts and no hoses or seals full of fluid, there’s less to leak and less routine upkeep compared with older hydraulic systems.

Owners still benefit from a few smart checks at service time. Because EPS relies on electrical power, strong battery and charging-system health are important, especially for short-trip city driving. Tyre condition and pressures, wheel alignment, and front-end bushes have a big impact on steering feel too. The steering rack boots should be intact and dry, and any clunks or notchiness through the wheel should be investigated early.

If the steering ever feels unusually heavy, intermittent, or the EPS warning light pops up, it’s worth scanning the car for fault codes and confirming battery and alternator output. Unlike a hydraulic setup, topping up fluid won’t fix anything here—there isn’t any. Any oil seen around the engine or subframe will be from other systems, not a missing steering pump.

• At each service: check battery state of health and charging voltage.
• Keep tyres correctly inflated and rotate regularly to protect steering feel.
• Inspect steering rack boots and front suspension components for wear.
• Address EPS warning lights promptly with a scan-tool diagnosis.

Popular questions

Does the 2018 Subaru Impreza have power-steering fluid?
No. The 2018 Impreza runs Electric Power Steering, so there’s no hydraulic fluid or pump. There’s nothing to top up or flush as part of normal maintenance.

Why is the steering heavy on a 2018 Impreza if there’s no pump?
Heavier feel can stem from a weak battery or charging issue, low tyre pressures, poor alignment, or a fault within the EPS rack or control module. If the EPS warning light appears, a diagnostic scan is the next step.

Can a failing “power-steering pump” cause noise on this model?
No. There’s no pump fitted. Whining or groaning near the front of the car is more likely a drive-belt, idler, alternator, or A/C component. Steering-related noises should be traced to the EPS rack, column joints, or front suspension.