Also known as: Power steering fluid reservoir cap, PAS Reservoir Cap, Power Steering Fluid Reservoir Cap, Cap, power steering fluid reservoir
OEM & aftermarket power steering reservoir cap from top brands — compare prices, check fitment, order with free delivery
Shop 21 power steering reservoir cap from 9 trusted brands including NTY, FEBI BILSTEIN, ABAKUS. Compare prices, check vehicle compatibility, and get free delivery on orders over £50.
The power steering reservoir cap — also referred to as the PAS reservoir cap or power steering fluid reservoir cap — seals the power steering fluid reservoir and incorporates a dipstick or level indicator on most applications. A missing or damaged cap allows moisture and debris into the PAS system, accelerating wear on the power steering pump and rack seals. On vehicles with electric power steering the reservoir feeds a separate hydraulic circuit, and contamination can trigger steering fault codes. CarParts247 stocks direct-fit replacement power steering reservoir caps for popular European and Asian vehicles.
Power steering fluid is a hydraulic oil that carries load between the pump and the rack piston. Unlike brake fluid, it does not absorb water to the same degree, but physical contamination from dirt or grit is equally damaging to closely toleranced pump vanes and rack seals.
The PAS reservoir is typically mounted on or near the power steering pump under the bonnet. Remove the cap with the engine cold to avoid scalding from hot fluid under pressure. Check the fluid level on the dipstick or sight glass and top up with the manufacturer-specified fluid type (ATF, universal PAS fluid, or a vehicle-specific grade) if required.
Commonly searched OE numbers fitting Power Steering Reservoir Cap from the TecDoc catalogue.