BMW Engine Valve Spring OEM 11347523971 (11 34 7 523 971) – Genuine OE Replacement Cylinder Head/Valvetrain Cam Spring Intake & Exhaust – Fits 1/2/3/4/5/6/7 Series E81 E87 E90 F30 F10 F20 F22 F32 F80 F82 F01 X1 X3 X4 X5 X6 Z4 M2 M3 M4

BMW OE Valvetrain Spring – Part 11347523971

Restore crisp valve control, smooth running and dependable high‑rev stability with this factory‑original BMW valvetrain spring. BMW part number 11347523971 is a direct‑fit, OE‑spec cylinder head spring designed to maintain correct seat pressure and consistent cam control across a wide range of BMW chassis. Ideal for head rebuilds, preventative refresh work and resolving valve float or misfire at higher RPM.

We install this authentic BMW spring on customer vehicles in our own workshop and it does exactly what enthusiasts and daily drivers need: precise fitment, quiet operation and long service life. Customers report smoother idle, sharper throttle response and renewed confidence on spirited drives.

• Original Equipment component for exact fit and factory performance
• Maintains correct seating pressure to reduce valve float and top‑end noise
• Perfect for cylinder head overhauls, timing work and reliability upgrades
• High stability at sustained RPM for track, fast road and daily use
• Built to BMW tolerances for durability and consistent results

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Fitting and Support

Professional installation recommended. MJ Modifications offers in‑house fitting in Warwickshire. For a quotation, email info@mjmodifications.co.uk.

Models Covered

If you are unsure on compatibility, use the Compatibility Check below before ordering.

Compatibility Check

Before dispatch we verify fitment against your vehicle. For UK registrations, provide your number plate at checkout. For international orders, supply the last 7 of your VIN.

Part Number

11347523971 (also written as 11 34 7 523 971)

Manufacturer

BMW

Warranty

Two years manufacturer warranty for UK customers and one year manufacturer warranty for international customers when a valid VIN is provided at checkout on compatible vehicles.

Add to basket for a simple, OE‑correct solution to your BMW valvetrain refresh. Trusted by MJ Modifications and our customers for reliability and performance.