Mosselman Oil Thermostat N55 (F-Series) with bolts and gasket sets / O ringsMosselman Turbo Systems is a Dutch manufacturer of high quality performance parts designed specifically for use in BMW and MINI cars. Mosselman has been in the tuning business for over 40 years and the vast majority of their products has been designed, tested and manufactured in house. If you own a BMW or MINI, they are a specialist in these makes. PRODUCT INFORMATION THE NEXT LEVEL OF TEMPERATURE CONTROL The N54, N55 and S55 engines are no strangers
Mosselman Turbo Systems is a Dutch manufacturer of high-quality performance parts designed specifically for use in BMW and MINI cars. Mosselman has been in the tuning business for over 40 years and the vast majority of their products has been designed, tested and manufactured in-house. If you own a BMW or MINI, they are a specialist in these makes.
PRODUCT INFORMATION
THE NEXT LEVEL OF TEMPERATURE CONTROL
The N54, N55 and S55 engines are no strangers to oil cooling problems, that’s why we recommend installing the MSL Oil Thermostat, especially for cars that are tuned. The standard oil temperature will reach around 120°C (250°F) with a normal driving style. The MSL Oil Thermostat will open at a lower temperature than the standard oil thermostat (at 85°C / 185°F) and will keep the temperature stable between 95 and 105°C (200 and 220°F), depending on the car model.
Installing the MSL thermostat ensures a cooler oil temperature which will result in more stable performance, but above all this improves the reliability of the engine. It is equipped with a real thermostat, not an always open solution. The oil will still reach the operating temperature at the same time as a stock thermostat.
Installation instructions come with kit.
Suitable for F87 M2 Coupe (N55), F20 M135i Hatch, F22 M235i Coupe, F23 M235i Convertible, F30 335i Sedan, F31 335i Touring, F34 335i Gran Turismo, F32 435i Coupe, F33 435i Convertible and F36 435i Gran Coupe.
Note:You will need the N54 Oil Thermostat for the E-Series 135i and 335i with the N55 engine.
MSL OIL THERMOSTAT
A highly recommended upgrade for N54, N55 and S55 engines.
20°C Lower Than Stock Operating temperature 20°C lower than stock.
Rock Solid Housing CNC machined housing.
Real Thermostat Equipped with a real thermostat, not an always open solution (for use in hot and cold climates).
Quick Installation
The Thermostat is plug-and-play and made out of a solid block of high-grade aluminum at Mosselman's own facility. It is equipped with a real thermostat, not an always open solution. The oil will still reach the operating temperature at the same time as a stock thermostat.
Additionally to the thermostat, Mosselman have oil cooler kits for the 1-Series E8x and the 3-Series E9x. We advise the Oil Cooler Kit for cars that use the full performance of the car during track use. The kits are available as single or twin cooler kits. The single cooler kit replaces the OEM cooler on the right side of the car, the twin kit will add an extra cooler on the left side of the car.
EXPERT'S ADVICE:
"The N55 engine is no stranger to oil cooling problems, that’s why we recommend installing the MSL Oil Thermostat. The standard oil thermostat will reach around 120 degrees Celsius with a normal driving style. The MSL Oil Thermostat will open at a lower temperature than the standard oil thermostat (at 85 degrees Celsius) and will keep the temperature stable between 95 and 105 degrees Celsius, depending on the car model. Installing the MSL thermostat ensures a cooler oil temperature which will result in more stable performance, but above all this improves the reliability of the engine. It is recommended to install the thermostat, especially for cars that are tuned.
The Thermostat is plug-and-play and made out of a solid block of high-grade aluminum at our own facility. It is equipped with a real thermostat, not an always open solution. The oil will still reach the operating temperature at the same time as a stock thermostat.
Note:The Oil Thermostat Installation kit prevents the Oil Thermostat from leaking and is highly recommended when installing the MSL Oil Thermostat. The kit includes 2 x O-ring for the oil hose and 1x rubber oil filter housing gasket. We advise to add it to your order."
MARK HENDRIKX - AUTOMOTIVE ENGINEER AT MOSSELMAN
FREQUENTLY ASKED QUESTIONS
Does the MSL Oil Thermostat have a real thermostat?
Yes, it is equipped with a real thermostat, not an always open solution. The oil will still reach the operating temperature at the same time as a stock thermostat.
Do I need new gaskets for the installation?
Yes, we highly recommend replacing the gasket and 0-rings to prevent the thermostat from leaking. We have an installation kit available, it includes 2 x O-ring for the oil hose and 1x rubber oil filter housing gasket. We advise to add it to your order.
Installation Time
The thermostat is plug-and-play, which means that you don't have to make modifications to install the thermostat. Just remove the old one and replace it with our MLS Oil Thermostat. The installation time will be approximately 30 minutes.
Models
1 Series / F20 (2012-2019) / M135i
2 Series / F22 / F23 (2014-2021) / M235i
2 Series / F87 M2 (2016-2021) / M2
3 Series / F30 / F31 / F34 (2012-2018) / 335i
4 Series / F32 / F33 / F36 (2014-2020) / 435i
Shipping Notes
Free Standard Shipping on $100+ Orders to the USA.
Except Preorder products are shipped in 48 hours.
Delivery to the USA:
Standard Shipping : 3-10 business days
If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
To process your return/exchange, please contact us at [email protected]
Why are these books so hard to find in libraries and bookstores??!
Format: Paperback
Bought nearly the whole book series after reading the reviews. My 8 and 10 year old boys love these books. My 10 year old read the first book on his way to and from soccer practice. He couldn't put it down and kept telling me what he read. My boys have read all the "Magic Treehouse", "I Survived" and some "I Escaped" books, as well as "Big Nate", "Diary of a Wimpy Kid", etc. BUT these battle books are the best. They really teach about the history of the wars which have shaped our modern times. WHY are these books so hard to find in libraries and bookstores... at least in Maryland? Maybe because "Great Battles for Boys" reeks of toxic masculinity? I really wonder. In any case, great books especially if you want your boys to read serious, informative books that are interesting and entertaining.
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Reviewed in the United States on February 1, 2024
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rashonda schild
Lexington, US
★★★★★ 5
Great for boys AND MOMS
Format: Paperback
Saw an ad for the series online and wanted to buy just one book to try. Received with 2 day Prime. Book was new. So, not only does this book have an incredible, intriguing story that sucked in my 10 year old who hates reading and struggles to read, it had me at Hello. The beginning of the book is filled with recipes! Was totally not expecting that! So for this Momma, under promise-over deliver was the theme here. Purchasing the rest of the books! Also look online for worksheets that parents have put together to go along with these books. Totally worth it. Happy Reading! AND Cooking!
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Reviewed in the United States on January 25, 2025
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Betsy C.
San Leandro, US
★★★★★ 5
Great reads for all levels
Format: Paperback
I bought 2 for a 6th grade boy I tutor. He has a beginning interest in history. He's been 'eating' these books up! These are well written, but not complex to turn a young reader off. There are many alternative resources to listed to dive into if a particular person or event sparks interest with the reader. There is appropriate vocabulary with explanations on some- others open a chance for my student & I to have a deeper discussion to clarify meaning & connect information.
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Reviewed in the United States on May 6, 2025
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XOAngel
Omaha, US
★★★★★ 4
Great book for an (almost) 11 year old to learn about WW2
Format: Paperback
My (almost) 11 year old says he enjoyed this book because it gives specific details and has pictures of what was going on making it easy to understand what was happening. The only thing he’d change was that the pictures weren’t in color (lol)!
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