Fix one of the most common B58 engine issues without the cost of replacing the entire valve cover. This PCV Diaphragm Repair Kit allows you to replace a failed or damaged diaphragm quickly and easily, restoring proper crankcase ventilation whilst saving both time and money.
A failed PCV diaphragm can cause symptoms such as whistling noises, rough running, increased oil consumption and smoke from the exhaust. This kit provides a straightforward solution by replacing the internal components responsible for crankcase pressure regulation.
To make installation easier, a replacement cap is included in the kit. The original cap often becomes brittle with age and can break during removal, so having a replacement on hand helps ensure a smooth repair from start to finish.
2 for £30 Offer
Many B58 owners choose to keep a spare diaphragm on hand due to how common PCV failures can be. Add two kits to your basket and receive the second kit at half price, reducing the total cost to just £30 and saving £10 compared to purchasing them separately.
• Repairs failed PCV diaphragms without replacing the entire valve cover
• No valve cover removal required
• Helps eliminate common whistling and squealing noises
• Assists in resolving crankcase pressure-related issues
• Helps reduce oil smoke and excessive oil consumption
• Direct replacement diaphragm repair solution
• Ideal preventative maintenance upgrade
• Replacement cap included in case the original cap breaks during removal
• Cost-effective alternative to replacing the complete valve cover
• Restores proper crankcase ventilation function
• Designed specifically for BMW B58 engines
• Simple and straightforward installation process
Included
• Rubber PCV Diaphragm
• Replacement PCV Cap
Spring
Installation
Designed to replace the failed internal PCV diaphragm without removing the valve cover. The included replacement cap helps avoid issues caused by brittle factory caps breaking during removal.
OE Reference Numbers
• 11127645173
• 173658
Compatible Vehicles
• BMW M140i / M140i xDrive – F20 / F21 (2015–2019)
• BMW M240i / M240i xDrive – F22 / F23 (2015–2019)
• BMW 340i / 340i xDrive – F30 / F31 / F34 GT (2014–2019)
• BMW 440i / 440i xDrive – F32 / F33 / F36 Gran Coupe (2015–2019)
• BMW 540i / 540i xDrive – G30 / G31 (2015–2019)
• BMW 640i / 640i xDrive – G32 GT (2016–2019)
• BMW 740i / 740i xDrive / 740Li / 740Li xDrive – G11 / G12 (2014–2019)
• BMW X3 M40i xDrive – G01 (2016–2019)
• BMW X4 M40i xDrive – G02 (2017–2019)
Please verify your vehicle is equipped with the B58 engine before purchasing.
