Elring 186.030 MLS Cylinder Head Gasket 1.2mm for BMW N55 3.0L I6 Turbo (replaces 11127599212) | OEM Top Gasket/Head Seal | Fits 135i M135i M235i M2 335i 435i 535i 640i 740i X1 X3 X4 X5 X6 35i N55B30

Elring 186.030 Head Gasket - 1.2 mm thickness - for BMW 3.0 turbo straight-six N55

Built for dependable sealing on tuned and stock applications, this Elring 1.2 mm cylinder head gasket is the smart choice when refreshing the top end on BMW’s single-turbo 3.0-litre N55 petrol engine. It directly supersedes BMW ref 11127599212 and carries Elring ref 186.030, giving you OE-matching quality, clean compression control and leak-free performance under boost.

Perfect for daily drivers, fast-road builds and track-day cars, this premium head seal has proven reliability on remapped setups, hybrid turbo conversions and standard power vehicles alike. We use this exact gasket in-house at MJ Modifications and our customers consistently report excellent results, stable coolant temps and long-term durability.

Reasons to choose this Elring head seal

• Direct-fit for BMW N55 3.0 turbo engines - precise fitment and excellent combustion sealing
• 1.2 mm thickness - maintains the intended compression characteristics
• Replaces BMW part number 11127599212 - Elring part number 186.030
• Designed for the heat and pressure of boosted applications - reliable under hard use
• Ideal during engine rebuilds, head skim, turbo upgrade or cooling system repairs

Vehicle applications - N55 3.0 petrol turbo

Compatible with a wide range of models fitted with the N55 straight-six:

• 1 Series - E82 135i, E88 135i, F20 M135i, F21 M135i
• 2 Series - F22 M235i, F23 M235i, F87 M2
• 3 Series - E90 E91 E92 E93 335i, F30 F31 F34 335i and ActiveHybrid 3
• 4 Series - F32 F33 F36 435i
• 5 Series - F07 GT 535i, F10 F11 535i and ActiveHybrid 5
• 6 Series - F06 F12 F13 640i
• 7 Series - F01 F02 740i including hybrid variants
• X Models - X1 E84 35i, X3 F25 35i, X4 F26 35i and M40i, X5 E70 F15 35i and 40i, X6 E71 F16 35i and 40i

Model coverage can vary by year, market and drivetrain. If you’re unsure, we offer a free fitment check before dispatch.

Part numbers and spec

• Elring reference: 186.030
• Supersedes BMW reference: 11127599212
• Thickness: 1.2 mm

When to install this gasket

• Top-end refresh or full engine rebuild on an N55
• Addressing combustion sealing issues or pressurised cooling systems
• During turbocharger replacement, timing work or head skim
• Preparing a reliable fast-road or track-day build

Professional fitting - MJ Modifications

Want it fitted properly first time? MJ Modifications in Warwickshire can supply and install this head gasket on your N55. For a fitting quote or technical advice, email info@mjmodifications.co.uk.

Compatibility check

Provide your UK registration or the last 7 of your VIN at checkout and we will confirm compatibility with your exact vehicle before shipping.

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