Oil Separator Membrane 70mm – Mercedes OM642 OM611 OM612 OM613 OM646 OM668 | OEM A6420101891
A failed 70mm oil separator membrane causes oil mist in the intake, increased oil consumption, and crankcase fault codes across a wide range of Mercedes diesel engines. This is one of the most universal oil separator membranes in the Mercedes diesel range — fits OM642, OM611, OM612, OM613, OM646, OM668, and OM628. Mercedes-Benz vehicles with OM642 3.0 V6, OM611 2.0/2.2 CDi, OM612 2.7 CDi, OM613 3.2 CDi, OM646 2.2 CDi, OM668 1.7 CDi, and OM628 4.0 V8 diesel engines
Fits OEM #A6420101891.
When to Inspect This Part
- whistling or excessive crankcase vacuum
- rough or unstable idle
- increased oil consumption
- oil residue in the intake
- smoke after warm-up
- mixture faults or an intake air leak
What's Included
- 1 × Oil Separator Membrane 70mm
Part Number / PN
A6420101891, A6420100391, A6680160334, 68188865AA, 31382010G, 05080116AA, K05080116AA, 5080116AA, 5066845AA, A6110160334, A6420102091, A6680160434, A6420101991, 5114348AB, 026012, A6110160134, A0001801015, A6420100591, A6110160234, A6680160534, A6420100291, 6110160134, 6110160334, 0001801015, 31382009f, 6420100591, 611016034, 6110160234, 6680160534, 5175514ab, 6420100191, 6420100891, 6420100691, hr6110160334a, a6291800315, 6291800315, 420100591
Important Fitment Check
Before ordering, compare the part design, dimensions, connectors, and every available OEM/P/N marking with the part installed on the vehicle. Matching OEM/P/N A6420101891 is the primary fitment check.
FAQ
How do I confirm fitment for this Oil Separator Membrane 70mm?
Compare the exact OEM/P/N and physical design with the installed part. The primary reference is A6420101891. Do not select the part by vehicle model alone.
What symptoms may indicate a problem with this Oil Separator Membrane 70mm?
Confirmed symptoms include whistling or excessive crankcase vacuum, rough or unstable idle, increased oil consumption, oil residue in the intake. Diagnose the original assembly before ordering so another fault is not mistaken for this part.
What is included with this Oil Separator Membrane 70mm?
The confirmed kit contents are: 1 × Oil Separator Membrane 70mm.
Does this listing include the complete surrounding assembly?
No. It includes only the item or repair components identified for this SKU. Inspect related parts separately and replace them only when diagnosis confirms a fault.
What should be checked before installation?
Check the OEM/P/N, dimensions, connectors, orientation, and condition of the mating components. Installation should follow the correct service procedure for the specific vehicle and assembly.
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Orders ship within 1–2 business days.
Standard delivery:
- USA: Some items ship from our US warehouse and arrive within 3 business days.
- USA-EU: 10–21 business days
- Worldwide: 14–30 business days
Shipping cost is shown at checkout.
Can I exchange or return an item?
Yes, you can exchange or return an item within 14 days of purchase. This right is guaranteed to you by the Law on the Protection of Consumer Rights
To use this feature, please make sure that:
- the product was not in use and has no traces of use: scratches, chips, abrasions, etc.
- the goods are fully completed and the integrity of the packaging is not violated
- retained all labels and factory markings