The power steering fluid is added to the power steering reservoir in the engine bay of a hydraulic-power-steering Grand Cherokee, typically located on the driver’s side near the firewall; use Mopar ATF+4.
Vehicle generations vary: older Grand Cherokees (the hydraulic PS systems common in many WK2 models from around 2011–2021) use a refillable reservoir and ATF+4, while newer Grand Cherokees (WL and later) employ electric power steering and do not use a power steering fluid reservoir. This article explains the hydraulic setup you’re likely dealing with, how to identify the reservoir, and how to refill it properly.
Where to find and identify the reservoir (hydraulic power steering)
Use these details to locate and confirm the hydraulic power steering reservoir in the engine bay.
Reservoir location and appearance
The reservoir is a small, usually translucent plastic container with a cap labeled Power Steering or PS. It is typically mounted on the engine bay’s left side (driver’s side) near the firewall and close to the power steering pump and belt drive.
- Look for a reservoir with min and max level marks on the side.
- The cap is often black and may include a symbol or the words “Power Steering Fluid” or “ATF+4.”
- Check your vehicle’s year and engine to confirm you have hydraulic PS; newer models may not have a visible reservoir at all.
Concluding note: On older hydraulic Grand Cherokees, this reservoir is your refill point. If you don’t see a reservoir or find no cap labeled for power steering, your vehicle likely uses electric power steering and does not require fluid addition.
What fluid to use and how to refill (hydraulic systems)
Before refilling, confirm you have a hydraulic PS system and use the correct fluid type. Mopar ATF+4 is the recommended fluid for most hydraulic Grand Cherokee PS reservoirs; avoid mixing fluids not specified by the manufacturer.
Fluid type and capacity guidance
Use Mopar ATF+4 or an equivalent ATF+4 specification fluid. If the reservoir is very low, a typical refill is on the order of a pint (about 0.5 quart) depending on the model and how much air is in the system. Always verify exact capacity in your owner’s manual or with a dealer if in doubt.
Before you start, ensure you’re working on a level surface and the engine is off and cool. If the reservoir is empty or there are signs of fluid contamination or a leak, address the underlying issue before attempting a refill.
To refill and bleed air from the hydraulic power steering system, follow these steps.
- Park on a level surface with the engine off and cold. Open the hood and locate the power steering reservoir.
- Clean the cap and the area around the reservoir to prevent dirt from entering.
- Remove the cap and check the level against the min/max marks.
- Slowly pour ATF+4 into the reservoir until the level sits between the min and max marks. Do not overfill.
- Replace the cap securely.
- Start the engine and with the wheels turned gently from lock to lock, move the steering wheel left to right several times to bleed air from the system. Do this with the engine running but at idle.
- Turn off the engine, wait a moment, and recheck the fluid level. Add more if needed, then replace the cap.
- Look for leaks around the reservoir, hoses, and pump. If you see leaks or the fluid level drops quickly, have the system inspected by a professional.
Concluding note: Bleeding the system helps remove air pockets that can cause a whining noise or stiff steering. If you’re uncomfortable performing these steps, consult a technician.
Important caveat for newer Grand Cherokees (electric power steering)
Starting with newer generations, Jeep uses electric power steering (EPS) on many Grand Cherokee models. In those vehicles, there is no hydraulic fluid reservoir or fluid to add, and the steering assist is electronic rather than hydraulic. If you own a 2022+ Grand Cherokee (and some later trims), do not attempt to add power steering fluid. If you experience steering issues, consult the owner’s manual or a dealership for EPS diagnostics.
Summary
For hydraulic power steering Grand Cherokees, locate the reservoir in the engine bay on the driver’s side near the firewall and refill with Mopar ATF+4 as needed, then bleed air by turning the steering wheel. Newer EPS-equipped Grand Cherokees do not use fluid or a reservoir, so no refilling is required. When in doubt about your model year or system type, check the owner’s manual or contact a dealer to confirm the correct service procedure.