PCV Valve N52 11127552281 Replacement for BMW by AUTOMAJOR | Crankcase vent valve. Fits N52 engine 128i 328i 528i X3 X5 Z4. Replaces 11127552281 oil separator valve

The AUTOMAJOR PCV Valve (Positive Crankcase Ventilation Valve, also called crankcase vent valve or breather valve) is a direct OEM replacement for BMW vehicles equipped with N51, N52, N52N, and N52K naturally aspirated inline-6 engines. The PCV valve regulates crankcase pressure by allowing blow-by gases to be drawn back into the intake manifold for combustion. This valve replaces BMW OEM 11127552281 (7552281). Cross-references with aftermarket part numbers 264-935 (264935), V20-2762 (V202762), 0360013, VCE0102, and SK510006. If your BMW uses any of these part numbers, this valve is the correct replacement. The PCV valve is one of the most common failure points on BMW N52 engines. Symptoms of failure are caused by the internal diaphragm tearing or the spring-loaded mechanism getting stuck — both leading to incorrect crankcase pressure regulation. Common symptoms of a failed PCV valve include: rough idle (especially when warm), engine misfire and stumbling at idle, vacuum leak symptoms with no obvious leak found, oil consumption increase (oil being drawn into intake), oil-fouled spark plugs, white smoke from exhaust at startup, valve cover gasket leaks (excess crankcase pressure pushes oil past the gasket), oil in the intake manifold or air filter housing, hissing or whistling noise from the engine bay, check engine light with codes P0171, P0174 (system too lean), P052E (PCV system performance), P053A, P053B, P053C, P053D, P053E, and reduced fuel economy. Replacing the PCV valve is a 30-60 minute DIY job. Tools needed: 8mm and 10mm sockets, ratchet, extension, T-30 Torx bit, screwdrivers, and shop towels. Procedure: remove the engine cover (if installed), locate the PCV valve on the side of the cylinder head (it has hoses connecting to the intake manifold and valve cover), disconnect all PCV hoses (note their orientation for reinstallation), remove the mounting bolts securing the PCV valve assembly, lift the assembly off, install the new AUTOMAJOR valve in the same orientation, reconnect all hoses to their original ports, install mounting bolts and torque to specification (5-7 ft-lbs / 7-10 Nm), reinstall the engine cover, start the engine and verify smooth idle, clear any stored diagnostic codes. This valve fits BMW vehicles with N51, N52, N52N, N52K engines: 128i E82/E88 (2008-2013), 328i / 328xi / 328i xDrive E90/E91/E92/E93 (2006-2013), 528i E60/F10 (2008-2011), 525i E60 (2006-2007), 530i / 530xi E60 (2006-2007), Z4 sDrive30i / 30iS / 35i E89 (2009-2016), X3 xDrive30i E83/F25 (2007-2017), X5 xDrive30i E70 (2007-2010), 525xi / 528xi E60 (2006-2010). All naturally aspirated 2.5L, 2.8L, and 3.0L inline-6 engines from the N52 family. Always confirm your vehicle uses one of the listed OEM part numbers before ordering — turbocharged N54/N55 engines use a different PCV valve. Backed by AUTOMAJOR — trusted OEM-quality replacement parts for BMW owners.

• Direct replacement for BMW OEM 11127552281 (7552281). Cross-references with aftermarket numbers 264-935 (264935), V20-2762 (V202762), 0360013, VCE0102, and SK510006. Compatible with BMW N51, N52, N52N, and N52K naturally aspirated inline-6 engines (2.5L, 2.8L, 3.0L) from 2006 to 2017. NOT for turbocharged N54/N55 engines — those use a different PCV valve.
• The PCV valve regulates crankcase pressure by allowing blow-by gases to be drawn back into the intake manifold for combustion. The internal diaphragm and spring-loaded mechanism wear over time — leading to incorrect crankcase pressure regulation, oil consumption, and emission system issues. One of the most common BMW N52 maintenance items.
• Symptoms of a failed PCV valve: rough idle (especially when warm), engine misfire and stumbling at idle, vacuum leak symptoms with no obvious leak found, oil consumption increase, oil-fouled spark plugs, white smoke from exhaust at startup, valve cover gasket leaks (excess crankcase pressure pushes oil past gasket), oil in intake manifold or air filter housing, hissing or whistling noise from engine bay, check engine codes P0171, P0174, P052E, P053A-P053E, reduced fuel economy.
• 30-60 minute DIY repair with basic tools (8mm and 10mm sockets, ratchet, T-30 Torx, screwdrivers). Remove engine cover, locate PCV valve on the side of cylinder head, disconnect all PCV hoses (note orientation), remove mounting bolts, lift assembly off, install new valve, reconnect all hoses to original ports, torque mounting bolts to 5-7 ft-lbs (7-10 Nm), reinstall engine cover, start engine and verify smooth idle, clear stored codes.
• Compatible with BMW 128i E82/E88 (2008-2013), 328i / 328xi / 328i xDrive E90/E91/E92/E93 (2006-2013), 528i E60/F10 (2008-2011), 525i E60 (2006-2007), 530i / 530xi E60 (2006-2007), Z4 sDrive30i / 30iS / 35i E89 (2009-2016), X3 xDrive30i E83/F25 (2007-2017), X5 xDrive30i E70 (2007-2010). All N51, N52, N52N, N52K naturally aspirated 2.5L, 2.8L, 3.0L inline-6 engines.