Skip to product information
SKU:
NLT1H00491
Ships for free in 2–4 business days.
Universal Fuel Pump Lock Ring Spanner Tool for BMW Mercedes
$59.99
In Stock
$59.99
Sale price
$59.99
Regular price
This new adjustable fuel-tank lock-ring spanner removes and installs compatible serrated pump-module retaining rings on BMW, Mercedes-Benz, and other vehicles.
Estimated delivery between
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- Many BMW fuel-pump and level-sender lock rings with matching lugs
- Many Mercedes-Benz serrated pump-module rings with matching diameter
- Select Audi, Volkswagen, Chrysler, Ford, GM, Volvo, Opel, and Asian applications after measurement
Product Overview
An in-tank pump or sending-unit job often stalls at a wide plastic lock ring that should not be attacked with a punch and hammer. The adjustable arms engage multiple ring lugs so torque is spread around the cap and sparks, broken tabs, and distorted rings are less likely.
Universal describes the adjustment range, not guaranteed access on every tank. Ring diameter, lug spacing, recessed openings, and body clearance must match the tool.
Measure the retaining ring and access opening, confirm drive size, and work only with the fuel system depressurized in a ventilated area free of flames, sparks, hot lamps, and static hazards.
Key Features & Performance
- Adjustable arms fit a range of retaining-ring diameters
- Multiple contact points reduce damage to plastic lugs
- Accepts a ratchet or breaker bar where shown
- Reusable tool for pump and sender service
Common Uses
- Opening a fuel tank for pump replacement
- Removing a level-sender lock ring
- Reinstalling a ring evenly after replacing its seal
Technical Specifications
- Product Type: Adjustable fuel-tank lock-ring tool
- Application: In-tank pump and sender modules
- Drive: Verify square-drive size shown
- Condition: New aftermarket service tool
Installation & Fitment
- Relieve fuel pressure and disconnect the battery
- Clean dirt away from the tank opening
- Adjust all arms to engage the ring evenly
- Use steady torque without impact tools
- Install a correct new tank seal and leak-test before closing access
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application that is not shown above. Model year, production date, serial number, engine or equipment specification, installed options, and previous repairs can change fitment. Match the original part, reference number, dimensions, connectors, mounting points, and product photos before purchase.
Frequently Asked Questions
Q: Will it fit every BMW or Mercedes? A: No. Measure the ring diameter, lug style, recess, and available clearance.
Q: Why is it better than a hammer and punch? A: It applies force at several lugs and avoids striking near fuel vapors or breaking the ring.
Q: Can I reuse the old tank seal? A: Follow the vehicle procedure; pump-module seals are commonly replaced once disturbed.
Q: Is this an original-equipment part? A: No. This is a new aftermarket product. Brand names and part numbers are used only to identify compatible applications.
Part Summary
keywords: fuel pump lock ring tool, BMW tank cap spanner, Mercedes fuel sender removal wrench, adjustable pump module tool, gas tank retaining ring remover
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, specifications, and application before purchase.