PCV Diaphragm Repair Kit – B58 Engines
This PCV diaphragm repair kit is designed to fix one of the most common issues on BMW B58 engines without the expense or labour involved in replacing the entire valve cover. It allows you to renew a failed, cracked, or leaking diaphragm without removing the valve cover, saving both time and cost.
A failed PCV diaphragm can cause symptoms such as whistling or squealing noises, rough running, increased oil consumption, or smoke from the exhaust. This kit provides a direct solution by replacing the internal diaphragm and related components responsible for crankcase pressure regulation.
One of the biggest challenges during DIY repairs is the original plastic cap, which often becomes brittle with age and can snap during removal. To eliminate this risk, the kit includes a new replacement cap, ensuring a smooth and stress-free installation.
This repair restores proper crankcase ventilation function and helps prevent further drivability or oil-related issues.
Key Benefits
- Repairs PCV diaphragm failure without replacing the valve cover
- No valve cover removal required
- Eliminates common squealing or whistling noises
- Helps resolve oil smoke and pressure-related issues
- Ideal preventative maintenance or fault repair
- Replacement cap included to avoid breakage during installation
- Cost-effective alternative to full valve cover replacement
What’s Included
- Replacement PCV diaphragm
- New PCV cap
- Required seals and components for installation
OE Reference Numbers
Vehicle Compatibility (B58 Engines)
- 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)
Shipping Policy:
Delivery Time: All small orders will be delivered within 48 hoursof placement excluding larger items ie. bonnets and alloys. Bonnets are delivered within 2-5 working days depending on courier availability and allow up to 72 hours for alloys. Subject to product availability and credit verification.
Shipping Cost: Our products are shipped free of cost.
Shipping Method: Orders will be shipped via DPD or Royal Mail depending on the item.
Tracking Information: A tracking number will be provided once the order has been shipped, and customers can track the status of their delivery through the courier's website.
Delivery Changes: If you need to change the delivery address after placing your order, please contact us as soon as possible. We will do our best to accommodate your request, but we cannot guarantee that it will be possible.
Return Policy:
Return Period: Customers have 14 days from the date of delivery to request a return.
Return Criteria: To be eligible for a return, items must be in their original condition and packaging, with all tags and labels still attached.
Return Process: To initiate a return, please contact our customer service team and provide your order number and the reason for the return. We will provide further instructions on how to proceed with the return.
Refunds: Refunds will be processed within 14 days of receipt of the returned item, and will be credited to the original payment method.
Return Shipping: The customer is responsible for the cost of returning the item, unless it was damaged or defective.
