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Description
Mosselman Oil Thermostat N54/N55 (E-Series)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
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 are included in kit
Suitable for E82 135i Coupe, E88 135i Convertible, E82 1 Series M (1M), E90 335i Sedan, E91 335i Touring, E92 335i Coupe, E93 335i Convertible and E89 Z4 35i & 35is Roadster models fitted with N54 or 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 N54 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 aluminium 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 / E82 / E88 (2007-2013) / 1 Series M (1M)
These balls are the biggest balls of them all. Well, not the biggest, but the best. Every other ball she would chew up in short order and I'd be throwing her a floppy piece of rubber. She just wants to fetch, but if it's not bouncing, she can't catch it on the bounce. Got these balls in July and no damage to them. I just ordered another pair, but only because the other two somehow got stuck up in trees. We have some very old and very large oak trees so not so easy to retrieve. Hope they somehow drop someday. But in the meantime, Lassie will be happy with her new ones. Very highly recommended!
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Reviewed in the United States on October 28, 2025
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Blonde Aggie
Lake Worth, US
★★★★★ 5
Works great for scent work! Bounce is great for air retrieve!
Size: 2-pack, Style: Duo, Size: 2-pack, Style: Duo
My dog doesn’t know he loves them yet but I do! They are a little softer so when we do air retrieve, I don’t have to worry as much about his teeth! I’m hoping he will learn to find them by smell vs sight. We often play in the evenings and he tends to loose his ball. Love chuck it! Right now, we have about 10 chuck it balls! The tennis balls don’t work for air retrieve! Chuckit does!!! Love the thrower too! Saves my arm!!!!
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Reviewed in the United States on August 6, 2025
N
Verified Purchase
None of your business
Los Angeles, US
★★★★★ 3
I guess the smell is offputting
Size: 2-pack, Style: Duo
My dog loves chocolate stuff. But for some reason, wasn’t a huge fan of these balls. She played with them a little bit, but they’re not her favorite.
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Reviewed in the United States on December 30, 2025
S
Verified Purchase
Stacie☺
Louisville, US
★★★★★ 5
Fun solid ball
Style: Recharges, Size: Medium, Style: Recharges, Size: Medium
Great squeaky balls! Glow doesn’t last for a long time, but they go far in the Chuck it. Solid ball, my dog doesn’t seem to destroy them.
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Reviewed in the United States on February 11, 2026
J
Verified Purchase
Jennifer Gugala
Natrona Heights, US
★★★★★ 5
Great ball!
Style: Recharges, Size: Medium
The dog loves chasing it! Walks around sqeeking it all the time. And bonus, I can see it in the middle of the floor when I get up in the middle of the night so I won't unknowing step on it.
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