The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.
Over time serpentine belts stretch, crack, and the ribs that ride on the accessory pulleys being to wear smooth. A squealing noise that increases with engine speed or as engine driven accessories are turned on may be noted. The noise is caused by the belt slipping on the pulleys, insufficiently driving them. Ineffective air conditioning, a battery warning light, or intermittent power steering assist can result from this.
The bad thermostat can cause two different sets of problems, depending on whether it's stuck open or stuck closed.
A thermostat that is stuck open can cause the engine to run colder than normal and turn on the check engine light. It may also cause poor fuel mileage and the heater to blow cool air.
A thermostat that is stuck closed will cause the vehicle to overheat. If a new thermostat doesn't resolve engine temperature problems, the cooling system needs to be checked for other issues.
» LEARN MORE: Signs of a bad thermostat, and how to fix it
When the engine coolant temperature sensor fails, it will send inaccurate information to the vehicle’s computer, causing the computer to react to false operating conditions. This will cause the engine to consume more fuel than normal, depleting fuel mileage, and causing black, sooty smoke from the engine under moderate to heavy acceleration. The check engine light will illuminate, and on-board diagnostic trouble codes may be stored for exhaust and emission system failure, fuel delivery system failure, and engine cooling system failure. Overheating may also occur, as the coolant sensor may be leaking fluid out of the engine, creating a an air pocket in the system.
When the radiator fans stop functioning properly, the engine temperature will rise. The spike in temperature will be highest when the vehicle is idling at a stop, but should subside once the vehicle begins moving again.
Additionally, the air conditioner typically won't blow as cold. This is because the air from the radiator fans also blows across the air conditioning condenser, so when the fans fail, both systems suffer.
You'll also usually see the check engine light and notice a drop in fuel economy. It's possible the fan will start making noise if it's failing, as well.
To effectively diagnose the non-functioning radiator fan in your 2011 BMW 335is, begin by checking the basic components such as the fan itself, the relay, and the fuses. This initial step is crucial as it can quickly reveal any obvious issues without delving into more complicated diagnostics. Next, utilize diagnostic tools like a multimeter and test light to assess the electrical system, ensuring that power is reaching the fan motor. If the fan does not operate when directly powered from the battery, it likely indicates a faulty motor that requires replacement. Additionally, inspect the radiator fan relay to confirm it is functioning properly, as a defective relay can disrupt the fan's operation. Don't overlook the coolant temperature sensor, which plays a vital role in regulating the fan's activity; if it malfunctions, the fan may not engage when needed. By following this structured approach, you can systematically identify and resolve the issues affecting your radiator fan, helping to maintain your vehicle's performance and prevent overheating.
When troubleshooting a non-working radiator fan in a 2011 BMW 335is, it's crucial to consider several common problems that could be at play. A blown fuse is often the first culprit to check, as it can easily disrupt the electrical flow to the fan. If the fuse is intact, the next step is to inspect the relay, which controls the fan's operation; a faulty relay can prevent the fan from receiving the necessary signals to turn on. Additionally, broken wires or poor connections can lead to power loss, so examining the wiring for any visible damage is essential. Another potential issue is a malfunctioning coolant temperature sensor, which may fail to signal the fan to activate when the engine reaches a certain temperature. Low coolant levels can also affect the fan's performance, as the system relies on adequate coolant to regulate temperature effectively. Lastly, the fan itself may be damaged or worn out, necessitating a replacement. By systematically checking these components, DIYers can effectively diagnose and resolve the radiator fan issue, ensuring optimal engine cooling and performance.
Fixing the radiator fan in your 2011 BMW 335is is not just a maintenance task; it is an urgent necessity to prevent serious engine damage. The radiator fan is essential for maintaining optimal engine temperature by facilitating airflow through the radiator. If the fan malfunctions, the engine can quickly overheat, leading to catastrophic failures that may require expensive repairs or even engine replacement. Ignoring warning signs, such as dashboard alerts indicating overheating, can exacerbate the problem, resulting in prolonged exposure to high temperatures that can warp engine components or damage the head gasket. Therefore, addressing any issues with the radiator fan immediately is crucial for preserving the health of your vehicle and ensuring safe driving conditions. Taking prompt action not only saves you from costly repairs but also enhances the longevity of your BMW.
See what others are asking about their BMW 335is. Get answers from RepairPal's community of auto experts and enthusiasts.
Read about related problems experienced by other BMW 335is drivers like you.