VTT BMW Gen 1 B58 PCV Cap Upgrade for F20 F21 F22 F23 F30 F31 F32 F33 F34 F36 - M140i M240i 340i 440i
Fix the common B58 PCV issue with the VTT BMW Gen 1 B58 PCV Cap. This billet aluminium PCV cap is the trusted upgrade for BMW M140i, M240i, 340i and 440i owners who want a reliable B58 PCV fix, reduced smoking, stable crankcase vacuum and long-term performance. Designed to replace the fragile factory plastic PCV diaphragm on the Gen 1 B58 valve cover, the VTT PCV cap uses a billet banjo fitting and a Vacuum/Boost adapter to route vacuum directly from the head ports to the intake manifold. This B58 PCV upgrade delivers a robust, serviceable solution that works with tuning, daily driving and spirited use.
At Nforcd we have installed and used this VTT PCV cap on our own builds and many customer cars. Feedback has been excellent. Customers report cleaner running, no more smoke caused by a torn PCV diaphragm and consistent crankcase control. If you are searching for BMW B58 PCV cap, B58 PCV replacement, B58 PCV valve cap, BMW M140i PCV fix, BMW 340i PCV upgrade or B58 catch can compatibility, this is the product you need.
Why choose the VTT Billet Aluminium B58 PCV Cap
- Direct replacement for the weak factory PCV diaphragm on Gen 1 B58 valve covers
- Billet aluminium construction for strength and reliability under boost
- Billet banjo fitting and Vacuum/Boost adapter move vacuum from head ports to manifold for proper crankcase vacuum
- Reduces smoking and oil vapour issues caused by cracked or torn PCV diaphragms
- Allows you to run a low side catch can if desired, and works perfectly with VTT high side catch can kits
- Mechanically sound design that keeps high and low sides correctly managed
- Ideal preventative upgrade for tuned and stock B58 engines
How the B58 PCV fix works
The stock Gen 1 B58 PCV diaphragm is known to crack or tear over time, which reduces crankcase vacuum and often causes smoke. The VTT PCV cap replaces the plastic cap with a billet piece and uses a billet banjo fitting plus the VTT Vacuum/Boost adapter to route vacuum directly from the head ports to the manifold. This removes the fragile components and restores correct crankcase function. It is a clean, reliable B58 PCV solution that also supports adding a catch can on the low side.
What is included
- One Billet PCV Cap
- One Billet Banjo Fitting
- One Vacuum/Boost Adapter
- One line with built-in check valve
Compatibility - BMW Gen 1 B58
Fits BMW models with the Gen 1 B58 engine as listed below.
1 Series
- F20 LCI 09/2015 to 06/2019 - M140i and M140ix
- F21 LCI 09/2015 to 06/2019 - M140i and M140ix
2 Series
- F22 09/2015 to 06/2017 - M240i and M240ix
- F22 LCI 09/2016 to 12/2019 - M240i and M240ix
- F23 09/2015 to 06/2017 - M240i and M240ix
- F23 LCI 10/2016 to 12/2019 - M240i and M240ix
3 Series
- F30 LCI 10/2014 to 10/2018 - 340i and 340ix
- F31 LCI 10/2014 to 06/2019 - 340i and 340ix
- F34 GT LCI 09/2015 to 12/2019 - 340i and 340ix
4 Series
- F32 04/2015 to 02/2017 - 440i and 440ix
- F32 LCI 05/2016 to 12/2019 - 440i and 440ix
- F33 03/2015 to 02/2017 - 440i and 440ix
- F33 LCI 05/2016 to 12/2019 - 440i and 440ix
- F36 Gran Coupé 03/2015 to 02/2017 - 440i and 440ix
- F36 Gran Coupé LCI 05/2016 to 12/2019 - 440i and 440ix
Installation
Simple install. Remove the factory PCV cap by gently prying it off, remove the diaphragm, seat the VTT billet cap in its place and tap down to engage the lip. Remove the vacuum hose, insert the Vacuum/Boost adapter inline, attach the supplied hose and tighten the fittings. This is a straightforward DIY for experienced enthusiasts, or book professional fitting with Nforcd in Warwickshire for complete peace of mind.
For fitting enquiries and workshop quotes, email Sales@nforcd.com
Best paired with
For the ultimate B58 crankcase ventilation setup, we recommend using this cap with the VTT High Side Catch Can kit and the VTT crankcase breather.
Compatibility Check
To ensure the part fits your vehicle, we run a compatibility check prior to dispatch. Provide your UK registration or the last 7 digits of your VIN at checkout and we will verify fitment.
Part Number
VTT-B58-PCV-CAP
Manufactured by
VTT - Vargas Turbocharger Technologies
Why buy from Nforcd
Specialists in BMW performance parts and B58 upgrades, we have hands-on experience with this VTT PCV cap and our customers love the results. If you are searching for BMW B58 PCV cap, B58 PCV fix kit, M140i PCV replacement, 340i PCV valve cap or B58 catch can upgrade, you are in the right place. Order with confidence and get expert support from our team.