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MOSSELMAN OIL THERMOSTAT
Product Delay: Please note the N54 and N55 products have a 1-2 week wait for availability.
NOTE1: Your VIN must be provided to ensure accurate order fulfillment.
NOTE2: It is highly recommended that you purchase the optional hardware kit for a new gasket and o-ring.
The N54, N55 and S55 engines are no strangers 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 highly recommended to install the thermostat, especially for cars that are tuned.
THE NEXT LEVEL OF TEMPERATURE CONTROL
A highly recommended upgrade for N54, N55 and S55 engines.
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.
Additionally to the thermostat we 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.
MSL OIL THERMOSTAT
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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
Takes only 30 minutes to install.
| Vehicle | Chassis | Engine |
| MSL Oil Thermostat N54 | ||
| BMW 135i | E82 | N54 |
| BMW 135i | E82 | N55 |
| BMW 1M | E82 | N54 |
| BMW 335i | E90 | N54 |
| BMW 335i | E90 | N55 |
| BMW Z4 35i | E89 | N54 |
| BMW Z4 LCI 35i | E89 | N54 |
| BMW Z4 35is | E89 | N54 |
| MSL Oil Thermostat N55 | ||
| BMW M135i | F20/F21 | N55 |
| BMW M235i | F22 | N55 |
| BMW M2 | F87 | N55 |
| BMW 335i | F30/F31 | N55 |
| BMW 335i GT | F34 | N55 |
| BMW 435i Gran Coupe | F36 | N55 |
| BMW 435i | F32/F33 | N55 |
| MSL Oil Thermostat S55 | ||
| BMW M2 Competition | F87 | S55 |
| BMW M3 | F8x | S55 |
| BMW M3 Competition | F80 | S55 |
| BMW M3 CS | F80 | S55 |
| BMW M4 | F8x | S55 |
| BMW M4 Competition | F82 | S55 |
| BMW M4 CS | F82 | S55 |
| BMW M4 GTS | F82 | S55 |
We are typically very quick and have a 24-48 hour turnaround time. Transit time depends on your order and which warehouse we are shipping from, but typical transit times are between 5-7 business days from one side of the US to the other.
Majority of the items we offer do ship free to the lower contiguous 48 states. States that require plane or boat to reach (such as Hawaii, Alaska, Puerto Rico, etc) do NOT qualify for free shipping. Please contact us to inquire about international shipping costs. During checkout, you will know which items ship free and which have shipping costs associated with them. In general, larger/heavier items will have additional shipping costs (body kits, wheels/rims, etc)
Even though everything can be shipped internationally, sometimes the cost is simply just too high and doesn't make sense to do so. We're here to make sure you have a great shopping experience, so if you have a product(s) you want to inquire about, please contact us at info@kiesmotorsports.com
Yes, we do price match reputable competitors in the marketplace. If you find a product cheaper elsewhere, please email us the (1) link of the product from our website and (2) the link to the competitor site. We will make an assessment on our end if we are able to price match or not and respond to you via email.
Typically you have 14 days to return a product you purchase when you change your mind. Damaged and improperly installed products are NOT eligible for returns. Shipping fees may be assessed and not refunded based on criteria as well as restocking fees. Please see our FAQ page for more details.
Unfortunate Kies Motorsports no longer does customer installs (with the exception of crank hubs - we still do thos inhouse). Our HQ is solely reserved for filming, office space, and shipping/receiving.