Packaged by Turner Thermostat Installation Kit with Thermostat - N54, N55, S55 OTN54.T85KT3

Thermostat Installation Kit with Thermostat - N54, N55, S55

High oil temperatures are the ultimate enemy of your engine's longevity and performance. If you want to keep pushing your BMW to the limit you need to manage the heat.
Packaged by Turner
T#: 55353595 | Part#: OTN54.T85KT3
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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390.23 $390.23
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Est. Ship Date:
on Jun 29, 2026
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Thermostat Installation Kit with Thermostat - N54, N55, S55
$390.23
This premium Oil Thermostat Upgrade & Refresh Kit . It’s engineered to drop your operating temperatures, maximize cooling efficiency, and ensure a completely leak-free installation. At the core of this kit is the Mosselman Billet Oil Thermostat .  By opening at 85°C (significantly earlier than the restrictive factory unit), it routes oil to your cooler sooner, keeping your oil operating temperatures right where they belong under heavy load. Doing the job twice is never an option, we’ve included a premium Elring profile gasket and a fresh O-ring to prevent leaks and help with ease of installation.
Prop 65 WarningProp 65 Warning

Cross Reference
  • 17228604345
  • 11428637820
  • OTN54.T85
Qty Description T# Part# Lifetime
2 Genuine BMW O-ring - 17228604345 T#179886 17228604345 YES
1 Elring Oil Cooler Gasket - N52 N54 N55 T#363983 11428637820~ELR YES
1 N54 & E8x/E9x N55 Mosselman Billet Oil Thermostat T#4621131 OTN54.T85~MSL YES

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MAKE MODEL SUBMODEL ENGINE Special Fitment Notes
BMW All All N54 3.0L Use vehicle selector to confirm fitment
BMW All All N55 3.0L Use vehicle selector to confirm fitment
BMW All All S55 3.0L Use vehicle selector to confirm fitment
*The above product applications have been written by Turner Motorsport. All warranties, product application, fitment, and performance are the responsibility of Turner Motorsport. For additional information see the terms of use.