Original BMW Valve Spring for BMW E36 3 Series, M3, E39 M5, Z3, and Z8 (1995–2003)

Original BMW valve spring 11-34-1-403-709 returns the intake or exhaust valve to its seat after the camshaft opens it, on engines in the E36 318i, 318is, 318ti, and M3, the E39 M5, the Z3, and the Z8. Valves seal the cylinder during combustion, and the spring is what pulls each one closed so that seal can happen. BMW identifies the part simply as a valve spring. Each spring weighs 38 g and is sold individually. When a spring weakens, the symptoms include misfires and loss of power under acceleration.

This Original BMW Part is covered by a 24-month parts warranty.

BMW has produced this spring since March 1994 and uses the same number across several engine families. BMW's parts data places it in the M44 four-cylinder of the 318i, 318is, 318ti, and Z3 1.9, the S50 and S52 six-cylinder engines of the E36 M3 and Z3 M models, and the S62 V8 shared by the E39 M5 and E52 Z8. That shared use explains why a spring fits both a four-cylinder Z3 Roadster and the V8 Z8.

Technical Details

• Manufacturer: BMW, genuine part
• Part number: 11-34-1-403-709
• BMW part name: Valve spring
• Weight: 38 g (1.34 oz)
• In BMW production since March 1994
• Engines in BMW's parts data: M44, S50, S52, and S62
• Sold individually
• Warranty: 24 months

Common Questions

What are the signs of a weak valve spring?
Misfires and loss of power under acceleration are the symptoms associated with valve spring failure.

Is this sold as a set?
No. Each unit is one spring, so order the quantity your cylinder head work requires.

Talk to PMB about the genuine BMW parts for your next head job.

Fitment & Compatibility

Use the fitment table below to confirm the exact year, make, model, submodel, and any application notes before ordering. PMB Performance can confirm this against your VIN, backed by more than 20 years of parts and fitment work.