OEMTOOLS Fuel Tank Lock Ring Tool 25558 — Adjustable Multi‑Arm, 3/8-inch Drive, 168mm Span

Servicing fuel pumps and tank modules often requires a specialized tool to engage the ring-shaped retainers used by many manufacturers. The OEMTOOLS 25558 Multi-Arm Fuel Tank Lock Ring Tool provides an adaptable solution: three interchangeable arms slide on a central track to match a wide range of ring diameters and engage the ring's ridges securely. With a 3/8" square drive and a maximum span of 168 mm, this tool works with many European and domestic vehicles, helping you swap fuel modules more quickly and safely than improvised methods.

How does the adjustable multi‑arm design fit different fuel pump rings?

The tool's arms slide along a middle track and lock in place using screws so you can match the arm spacing to the retaining ring's ridges. A notch at each arm tip bites into the ring profile to prevent slipping while you apply torque.

• Three interchangeable arms for flexible configurations
• Adjustable along the center track to fit varying ring diameters
• Arm notches designed to engage plastic and metal ring ridges
• Maximum adjustable span of 168 mm to cover common sizes

Will this tool prevent damage when removing or installing lock rings?

Yes — the OEMTOOLS wrench is built to distribute force across engaged ridges rather than prying on the ring edge, which reduces the chance of cracking or deforming plastic collars. Using the proper arm placement and a ratchet on the 3/8" drive keeps torque controlled and centered.

• Notched arm ends reduce slippage and scoring
• Even torque application through the 3/8" square drive
• Compatible with common ratchets and extensions for better control
• Avoids hammering or prying that can ruin retaining rings

Which vehicles and service tasks is this spanner wrench compatible with?

The design targets a broad set of vehicles that use external retaining rings on fuel modules, including many Audi, BMW, Chrysler, Ford, GM, Mercedes, and VW models. It’s intended for removal and installation of pump locking rings and other retaining collars encountered during fuel system service.

• Near-universal application across European and domestic makes
• Removes and installs fuel pump locking and retaining rings
• Works on both plastic and metal ring types with ridged profiles
• Suits in‑garage repairs and professional shop use

How do I use the 3/8" square drive with my existing ratchet or extension?

Place the ratchet or extension into the 3/8" square drive on the wrench body, align the arms to the ring ridges, and tighten or loosen the retaining ring with steady, controlled motions. The square drive accepts standard 3/8" drive tools so you can add torque or reach confined spaces as needed.

• Insert a standard 3/8" ratchet or socket extension into the drive
• Adjust arm positions, engage ring ridges, then torque smoothly
• Use extensions to reach recessed fuel module rings
• Work in reverse to install the ring, ensuring even engagement

Who this tool is for: The OEMTOOLS 25558 Multi‑Arm Fuel Tank Lock Ring Tool is aimed at professional technicians, independent mechanics, and DIY enthusiasts who perform fuel pump or module service and need a safe, adjustable way to remove and install retaining rings. If you want to avoid makeshift removal methods that risk damaged collars and time-consuming repairs, this multi‑arm spanner wrench is a practical addition to your fuel system toolset.