Restore lost engine power, resolve underboost fault codes, and prevent compressor surge on your turbocharged Volkswagen or Audi.
Restore lost engine power, resolve underboost fault codes, and prevent compressor surge on your turbocharged Volkswagen or Audi.
Eliminate massive vacuum leaks and restore smooth idle with this comprehensive crankcase ventilation kit from Febi Bilstein.
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This product was last offered at the strikethrough price on
07-20-2026
Cure your rough idle, whistling engine, and oil consumption issues with this complete crankcase ventilation kit from Febi Bilstein.
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This product was last offered at the strikethrough price on
07-20-2026
Cure your rough idle, whistling engine, and oil consumption issues with this OE-quality PCV valve replacement from Febi Bilstein.
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This product was last offered at the strikethrough price on
07-20-2026
Keep your idle steady. - 037906457E
For vehicles with VIN up to 1H-S-999 000 only, split is in the 1995 model year
Located beneath the supercharger compressor
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Located on top of the valve cover
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For vehicles with AEG engine code only
Located on top of the valve cover
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Common cure for DTC P0441
Common cure for DTC P0441
For vehicles with VIN from 1H-S-007 947 through VIN 1H-S-999 000 only, split is in the 1995 model year
Large breather hose that runs around the intake manifold
10X Entries Into Our F80 M3 Sweepstakes
This product was last offered at the strikethrough price on
05-29-2026
Also called the "breather valve" or "oil separator"
Direct OE replacement pneumatic bypass valve to cure boost leaks, restore lost power, and eliminate that notorious deceleration "honk."
Mounts on the driver side of the intake manifold
2X Entries Into Our F80 M3 Sweepstakes
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Located on top of the valve cover
2X Entries Into Our F80 M3 Sweepstakes
For vehicles with AEG engine code only
Located in intake boot, recirculates extra air from turbocharger
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This product was last offered at the strikethrough price on
05-10-2026