04E 103 464AM – Oil Separator

Description

The 04E103464AM Oil Separator is an OEM-quality replacement component mounted at the front of the engine block. This 04E103464AM Oil Separator extracts oil droplets from crankcase blow-by gases before they re-enter the intake system. Consequently, it keeps the intake tract clean and ensures the engine breathes efficiently during all operating conditions.

Manufacturers engineer this unit to handle the specific demands of modern turbocharged EA211 engines. Furthermore, the internal baffling and check valve design effectively return separated oil directly back to the crankcase. Therefore, replacing a worn unit with this OE-quality 04E103464AM Oil Separator restores correct crankcase ventilation and protects downstream components from oil contamination.

Why It Matters

The oil separator is a key part of the Positive Crankcase Ventilation system. During normal engine operation, combustion gases inevitably pass the piston rings and enter the crankcase. These gases carry fine oil mist that must be separated before the gases recirculate into the intake manifold.

If the separator cracks, clogs, or fails internally, however, oil-laden gases flow directly into the intake system. Consequently, this causes carbon deposits to accumulate on the intake valves and throttle body. Moreover, unmetered air entering through a cracked housing triggers lean-condition fault codes and rough idle complaints. Therefore, addressing a failing separator promptly prevents more extensive and costly engine repairs.

Signs of Failure

Watch for these common symptoms when the oil separator begins to deteriorate:

• Noticeable increase in engine oil consumption between scheduled service intervals.

• Visible oil residue coating the inside of the intake piping or air filter housing.

• Blue-tinted smoke appearing from the exhaust, particularly during acceleration.

• Rough idle quality, engine misfires, or hesitation under light throttle conditions.

• An illuminated Check Engine Light with lean mixture or crankcase ventilation fault codes.

• Oil leaks developing around the separator housing or its connected breather hoses.

Key Features

• OE Part Number: 04E 103 464 AM

• Function: Separates oil mist from crankcase gases and returns oil to the sump.

• Location: Mounted at the front side of the engine block on compatible EA211 engines.

• Fitment: Direct OE-style replacement requiring no modifications for installation.

• Design: Internal baffling and integrated check valve for efficient oil-gas separation.

• Service Benefit: Restores clean crankcase ventilation and protects intake components.

Service Notes

Always verify fitment by VIN before ordering. When replacing the oil separator, inspect all connected breather hoses for cracks, softness, or oil saturation. Additionally, check the mounting surface on the engine block for warping or debris before installing the new unit.

Compatibility

Always verify fitment by VIN before ordering. This part is primarily used on EA211 1.2T and 1.4T engines.

Cross Reference Numbers

• 04E 103 464 AM

Additional information