AAU9903 - Sedimentor Sealing Ring

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€1,00

€1,00 - €1,00

€1,00

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Aftermarket: Quality alternative. This is a quality alternative, designed to fit and function like the original part, often at a more competitive price.

Sedimentor Sealing Ring for the diesel fuel filter and sedimentor assembly.

The sedimentor separates water and sediment from the diesel fuel before it reaches the fuel filter. This sealing ring seats between the sedimentor bowl and its housing, maintaining a fuel-tight joint and preventing leaks and air ingress in the fuel supply. A correctly seating seal is required to keep the fuel system primed.

For diesel applications.

Vehicle Model Land Rover Defender up to 2016
Land Rover Discovery 1 1989-1998 (L318)
Range Rover Classic up to 1994
Land Rover Series 2 and 3

Fitment Notes SERIES II/IIA/III — Diesel fuel filter and sedimentor seal
DEFENDER 1987-2006 — Diesel engines; fits fuel filter and sedimentor assemblies
DISCOVERY 1 1989-1998 — From VIN FA393361 to WA799999
RANGE ROVER CLASSIC 1992-1994 — From VIN JA610294

Alternative Codes

AAU9903GAAU9903

In stock 233 units

223 · Gouda 10 · Drachten

Express delivery available

When will my order arrive?

Order before 15:00 (Mon–Fri): same-day dispatch for in-stock items.
UPS Express (order before 14:00): dispatched today, delivered tomorrow where available.
Netherlands / Belgium / Germany: 2–4 working days.
Other EU countries + UK: 4–8 working days.
Outside EU/UK: delivery times vary — contact us for an estimate.

Items may ship from multiple warehouses at no extra cost.

Job kits containing this part

This part is included in 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What is the AAU9903G sedimentor sealing ring used for?

The AAU9903G is a sealing ring for the diesel fuel filter and sedimentor assembly. It seats between the sedimentor bowl and its housing to keep a fuel-tight joint, preventing leaks and air being drawn into the fuel supply. A good seal here keeps the diesel fuel system primed.

How many sealing rings do I need, and should I replace it every time?

You typically need one sedimentor sealing ring per sedimentor bowl. It's usually treated as a single-use seal, so replace it whenever the bowl is removed for draining or a filter change. Reusing an old ring often causes fuel weeps or air ingress that stops the diesel system priming.

Which Land Rovers does this sedimentor seal fit?

This sedimentor sealing ring fits diesel Series II/IIA/III, the Defender 1987-2006 with diesel engines, the Discovery 1 (1989-1998) from VIN FA393361 to WA799999, and the Range Rover Classic (1992-1994) from VIN JA610294. Use your VIN to confirm fitment on Discovery 1 and Range Rover Classic.