<p>13621433076</p> <h2>Description</h2> <div class="extended__specifications"> <div class="grid-x grid-margin-x grid-margin-y"> <div class="cell small-12 medium-4"> <div class="extended__details"> <h3>Details</h3> <dl> <dt>SKU:</dt> <dd>BMW-13621433076</dd> <dd></dd> <dt>Made in:</dt> <dd>Germany<span> </span><span aria-haspopup="true" data-tooltip="" title="We do our best to keep this information updated and accurate, but we cannot guarantee Country of Origin as manufacturers may permanently change their location without any notice."><i class="fas fa-question-circle"></i></span> </dd> <dt>Quality:</dt> <dd>Genuine<span> </span><span aria-haspopup="true" data-tooltip="" title="This is a product that we have sourced from the local dealer network and is the same part that the dealership would offer you to install on your car today. This part will come branded by the vehicle manufacturer (BMW, Volvo, Audi, etc.) and often at a premium cost. In nearly every instance the part inside the box will have been manufactured by one of their approved OE Suppliers such as Bosch, Hella, Mann, or Lemforder, or many others. Genuine parts from FCP will be sourced from a dealer and in the car manufacturer’s packaging."><i class="fas fa-question-circle"></i></span> </dd> </dl> </div> </div> <div class="cell small-12 medium-4"> <div class="extended__oeNumbers"> <dl> <dt> <h3>OE Numbers</h3> </dt> <dd>13621433076, 13620150974, 23017838935</dd> </dl> </div> </div> <div class="cell small-12 medium-4"> <div class="extended__mfgNumbers"> <dl> <dt> <h3>MFG Numbers</h3> </dt> <dd>N/A</dd> </dl> </div> </div> </div> </div> <div class="extended__moreInfo"> <h3>Product Information</h3> <div class="extended__brandDetails"> <p><strong>Monitors oil/coolant temperature</strong></p> <p>This sensor is used in two locations on BMW's and serves as both an oil temperature and water temperature sensor. As a water temp sensor it is located in the side of the cylinder heads. As an oil temperature sensor it is located in the side of the oil filter stand at the front of the engine. This sensor determines temperature by changes in its electrical resistance. This information is relayed to your gauge cluster as well as to the DME where the information is used to adjust fuel, cooling fan operation, and vehicle diagnostics.</p> </div> <strong>Engine Coolant Temperature Sensor</strong> <p>The engine coolant temperature (ECT) sensor, or simply coolant temp sensor, plays a vital role in monitoring the engine's operating temperature and communicating this information to various vehicle systems. This sensor is located in the engine's coolant passage typically in the cylinder head or block. It works by varying its resistance based on the temperature: as the engine heats up, the resistance decreases, and as it cools down, the resistance increases. The ECT sensor sends this data to the ECU, which uses it for several critical functions, such as the air-fuel mixture, ignition timing, and control of the cooling fans and dashboard temperature gauge. There are many European applications where there is more than one coolant temp sensor, separating the signals used for engine ECU and other functions such as gauges and fans.</p> <p>A faulty sensor might send incorrect temperature readings to the ECU, resulting in poor engine performance. The most common example is if the sensor incorrectly signals that the engine is colder than it is, the ECU will enrich the air-fuel mixture unnecessarily, leading to rough idling, poor fuel economy, or even black smoke from the exhaust due to unburnt fuel.</p> <p>Conversely, if the sensor falsely indicates an engine overheating condition, the ECU might trigger warning lights, prematurely activate the cooling fans, or even cause the car to go into "limp mode," limiting engine power to prevent damage (however this is a rarer failure mode).</p> <strong>Engine Coolant Temperature Sensor Failure Symptoms</strong> <ul> <li>Wrong Temp Readings: If the coolant tempe