Power Steering Reservoirs

Power Steering Reservoirs: the tank that keeps your pump fed and cool

The reservoir holds the hydraulic fluid your power steering pump draws from, feeds the pump on the low-pressure side, and gives air and heat a place to settle out before the fluid cycles back through. Fit an aftermarket power steering reservoir when the factory plastic unit has cracked, gone brittle, or you want a cleaner, aluminum-bodied tank in the bay that's easier to check fluid level on and less likely to weep at the seams. It's a straightforward job: drain, swap, refill, bleed the air out by turning the wheel lock to lock with the engine idling.

What ThreePiece stocks

This category currently shows 5 products from 2 brands: Mishimoto (four of the sampled units) and Weapon R (one). Prices run from $123 to $168, which is the current range for what's in stock rather than a fixed quote. Concrete examples include the Mishimoto Aluminum Power Steering Reservoir Tank (MMRT-PSA) at the lower end, the Mishimoto Pontiac GTO/G8 Polished Aluminum Reservoir, and the Weapon R 02-05 Subaru WRX Reservoir Tank.

Vehicle-specific fitment data covers Pontiac and Subaru here, with named applications for the Pontiac G8, Pontiac GTO and Subaru WRX across roughly the 2002-2009 model years. Two of the products carry that dedicated fitment; the others, like the MMRT-PSA, are universal-style tanks that mount where you have room and route your own lines.

How to choose

The split is simple. If you drive one of the covered cars, a vehicle-specific tank like the GTO/G8 or WRX unit bolts to factory mounting points and matches the stock line routing, so it's the least-fuss install. If your car isn't listed, a universal aluminum tank like the MMRT-PSA gives you the widest fit but means sorting your own brackets and hose connections. Finish is the other trade-off: the polished GTO/G8 tank costs more than the plain aluminum version, and that difference is cosmetic, not functional.

What else you need with it

A reservoir swap is a good moment to refresh the plumbing around it. Look at Fittings and Adapters to match hose sizes and thread pitches to the new tank. If you're doing wider engine-bay work, the same section carries Radiators, Oil Filters, Fuel Pumps and Gasket Kits for anything you find while you're in there. Browse the full Engine Components section to see everything grouped together.

Fitment help and ordering

Not sure whether a tank matches your car? Call fitment help at 813-535-5801 before you order, or reach us through contact us. All orders ship with free shipping, and Affirm and Katapult financing is available at checkout through our financing options.

Power Steering Reservoirs: the tank that keeps your pump fed and cool

The reservoir holds the hydraulic fluid your power steering pump draws from, feeds the pump on the low-pressure side, and gives air and heat a place to settle out before the fluid cycles back through. Fit an aftermarket power steering reservoir when the factory plastic unit has cracked, gone brittle, or you want a cleaner, aluminum-bodied tank in the bay that's easier to check fluid level on and less likely to weep at the seams. It's a straightforward job: drain, swap, refill, bleed the air out by turning the wheel lock to lock with the engine idling.

What ThreePiece stocks

This category currently shows 5 products from 2 brands: Mishimoto (four of the sampled units) and Weapon R (one). Prices run from $123 to $168, which is the current range for what's in stock rather than a fixed quote. Concrete examples include the Mishimoto Aluminum Power Steering Reservoir Tank (MMRT-PSA) at the lower end, the Mishimoto Pontiac GTO/G8 Polished Aluminum Reservoir, and the Weapon R 02-05 Subaru WRX Reservoir Tank.

Vehicle-specific fitment data covers Pontiac and Subaru here, with named applications for the Pontiac G8, Pontiac GTO and Subaru WRX across roughly the 2002-2009 model years. Two of the products carry that dedicated fitment; the others, like the MMRT-PSA, are universal-style tanks that mount where you have room and route your own lines.

How to choose

The split is simple. If you drive one of the covered cars, a vehicle-specific tank like the GTO/G8 or WRX unit bolts to factory mounting points and matches the stock line routing, so it's the least-fuss install. If your car isn't listed, a universal aluminum tank like the MMRT-PSA gives you the widest fit but means sorting your own brackets and hose connections. Finish is the other trade-off: the polished GTO/G8 tank costs more than the plain aluminum version, and that difference is cosmetic, not functional.

What else you need with it

A reservoir swap is a good moment to refresh the plumbing around it. Look at Fittings and Adapters to match hose sizes and thread pitches to the new tank. If you're doing wider engine-bay work, the same section carries Radiators, Oil Filters, Fuel Pumps and Gasket Kits for anything you find while you're in there. Browse the full Engine Components section to see everything grouped together.

Fitment help and ordering

Not sure whether a tank matches your car? Call fitment help at 813-535-5801 before you order, or reach us through contact us. All orders ship with free shipping, and Affirm and Katapult financing is available at checkout through our financing options.