Mercedes-Benz 0004233986 — Cross Reference, Specification & Replacement
Mercedes-Benz 0004233986 is a Type 14 long stroke air brake chamber diaphragm. Viaforta part VF-14LS is a direct fabric-reinforced replacement, manufactured in Türkiye.
Also written as A0004233986
| Size | 14LS |
|---|---|
| Stroke type | Long Stroke |
| Material | Fabric-reinforced rubber compound, made in Türkiye |
| Fitment | Direct fit for Type 14 service brake chambers |
| Viaforta part no. | VF-14LS |
Dimensional data is not published. Manufacturing tolerances vary between production batches, and a fixed published figure that a shipment later disagrees with is worse than no figure at all. Fitment is confirmed by Type and stroke, and by the OEM number stamped on your chamber.
Order quantities and lead times are confirmed per order — request a quote.
What is this part?
Mercedes-Benz 0004233986 identifies the diaphragm fitted inside a Type 14 long stroke service brake chamber. Type 14 refers to the effective area of the diaphragm — 14 square inches — which is what determines the output force the chamber produces at a given air pressure. The long stroke designation refers to the travel available: extended-travel chambers with a deeper diaphragm profile. A diaphragm of the wrong Type or the wrong stroke will either not seal correctly or will not deliver full travel, so both figures have to match.
What does this number tell you?
Mercedes-Benz 0004233986 is the number Mercedes-Benz lists for this diaphragm in its own parts catalogue. A vehicle manufacturer does not make the diaphragm — it specifies one and prints its own reference on the box, so this number is what a service manual and a dealer system will recognise.
The same diaphragm is catalogued by WABCO as 897 121 585 4 and by DAF as 0069086.
Equivalent part numbers
The same diaphragm is catalogued under the following numbers by other manufacturers. Any of these can be replaced by Viaforta VF-14LS.
| Brand | OEM number |
|---|---|
| Mercedes-Benz | 0004233986Exact match |
| WABCO | 897 121 615 4 |
| WABCO | 897 121 585 4 |
| WABCO | 897 121 586 4 |
| DAF | 0069086 |
Vehicle applications
This diaphragm is catalogued for the vehicles below. Source: Autodoc.
2 vehicles
| Make | Model | Years |
|---|---|---|
| Mercedes-Benz | MK | 1987-2005 |
| Mercedes-Benz | NG | 1973-1998 |
WABCO manufacture air brake systems rather than vehicles — their numbers are catalogue references used across multiple vehicle makes.
These lists come from published aftermarket catalogues, not from the vehicle manufacturers. Confirm the Type marking and the OEM number stamped on your brake chamber before ordering — send us the number and we will confirm the match within 24 hours. Why this check matters
Viaforta replacement
Viaforta VF-14LS is manufactured in Türkiye from fabric-reinforced rubber, blended to a formulation of our own. It is supplied in Viaforta packaging and is available in trial quantities as well as full container loads.
Full product page
Specifications, complete cross-reference table, applications and FAQ for Viaforta VF-14LS.
Type 14 Brake Chamber Diaphragm, Long Stroke · VF-14LS →
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