Promrmr fuel injector gasket ring & decoupling element kit for BMW B38 N55 — 6 O-rings + 6 seals, direct-fit replacement

Promrmr fuel injector gasket ring and decoupling element kit replaces worn seals to restore injector fitment and reduce fuel leaks on compatible BMW engines.

If your BMW shows signs of rough idle, fuel odor, or reduced efficiency, worn injector seals are a common, serviceable cause. This Promrmr kit includes six injector O-rings (replacement part 13537591006) and six decoupling elements (replacement part 13537577649) designed as direct-fit replacements for a wide range of BMW models and engine families. The parts are made to match factory geometry so installation is straightforward for a professional technician or knowledgeable DIYer with basic engine access.

Which BMW models and engines use this Promrmr kit?

This kit covers many BMW model years across the 1, 2, 3, 4, 5, 6, 7, X and Z Series that use the specified injector parts. Confirm your car’s existing part numbers or compare the injector shapes in the product images to ensure compatibility before ordering.

• Fits engine types including B38 and N55 and numerous F-, E- and G-series chassis.
• Common fitments: 135i, 228i, 335i, 428i, 528i, 535i, 740i, X3, X5, X6, Z4, and many more listed in the vehicle compatibility chart.
• Applicable model years span roughly 2008–2019 depending on chassis and engine variant.

How do these seals improve engine performance and reliability?

Injector O-rings and decoupling elements keep fuel contained where it belongs and reduce vibration transfer from the injector body to the intake. Replacing aged or cracked seals helps prevent fuel leaks, eliminates vacuum leaks around the injector bore, and supports consistent spray patterns for better combustion control.

• Precision sealing minimizes fuel seepage and prevents air intrusion into the intake tract.
• Decoupling elements reduce mechanical wear and dampen injector vibrations.
• Properly seated injectors maintain consistent fuel atomization for smoother running.

What should I expect during installation and maintenance?

Installation is a routine service when replacing injectors or performing intake-related repairs. The kit supplies six of each component so it covers a full bank of injectors on most engines; follow service manual torque and cleanliness procedures to avoid debris or misalignment.

• Inspect injector bores and rails for carbon buildup before fitting new seals.
• Use a light lubricant compatible with fuel system components to ease O-ring seating.
• Replace seals in matched sets and test for leaks after reassembly.

Are these Promrmr parts an original-equipment match?

These replacement parts are manufactured to replicate the fit and function of OEM injector O-rings and decoupling elements. While not sold as BMW-branded original parts, the kit is intended to meet the same dimensional and sealing requirements for direct installation into compatible injectors.

• Contains exact quantities: six O-rings and six decoupling elements per kit.
• Designed to match the replacement numbers 13537591006 and 13537577649.
• Recommended to confirm part numbers and visual fit before installation.

Who is this for: This Promrmr seal kit is aimed at BMW owners, independent mechanics and professional shops that service multi-cylinder BMW engines listed in the compatibility notes. It's a practical purchase for anyone performing injector servicing, intake manifold removal, or addressing fuel smell and idle instability caused by degraded injector seals. If you are unsure about fitment, compare the replacement part numbers on your vehicle or consult a technician before installing.