Why change your air filter?

You should change the cabin air filter of your 1988 BMW 735iL for a few reasons:

• Enhancing the air quality inside the car: The cabin air filter helps to remove pollutants, dust, and other allergens from the air inside the car, which improves the air quality for the passengers.
• Improved engine performance: A clean air filter allows for a sufficient amount of air to reach the engine, which can improve overall performance and fuel efficiency.
• Improving the air quality outside the car: A clean air filter can also help improve the air quality outside the car by reducing the emissions of pollutants.
• Prolonging the life of the HVAC system: The cabin air filter also helps to keep the heating and air conditioning system running smoothly, which helps increase the efficiency of the system.
• Protecting the engine: A dirty or clogged air filter decreases the airflow to the engine, which can damage the engine over time.

By changing the air filter on a regular basis, you can ensure that your BMW 735iL engine and HVAC system are running efficiently, and that the air inside and outside the car is clean and healthy.

The correct cabin air filter on a 1988 BMW 735iL

For any 1988 BMW 735iL, you can use PENTIUS PHB8909 cabin air filters. These are an exact fit and will match the required specifications of your 735iL. We always try to recommend the best possible air filters for your money, and these air filters are either a factory recommendation or an equivalent replacement available in today’s market at a reasonable price.

How often should I change my cabin air filter?

Generally, it is advised that you replace the cabin air filter once per year, or every 12,500 miles, whichever comes first. If you drive in a heavily polluted area, or in an area with high levels of dust, pollen, or other allergens, consider changing the filter more frequently. Similarly, if you often drive on dirt or gravel roads, or if you use your 1988 BMW 735iL for off-roading, the filter may need to be changed more often.

It’s also important to pay attention to these indicators that the filter needs to be changed, including:

• Odd smells coming from the vents
• Reduced airflow from the vents
• Increased dust and debris inside the cabin

Changing the cabin air filter on a 1988 BMW 735iL

This is a process you can do on your own with some standard tools. Of course, consult your owner’s manual, as well as a factory service manual (FSM). The video shown below does a good job of demonstrating the process.

Tips for changing the cabin air filter on your 1988 BMW 735iL

Ensure you review the video above before you attempt to replace the air filter on your 1988 BMW 735iL, as well as review your factory service manual. Additionally, we have some tips below here to help you as you do this repair.

• Clean the area around the filter: Before installing the new filter, use a vacuum cleaner or compressed air to clean the area around the filter. This will help prevent debris from obstructing the new filter.
• Orient the filter correctly: Make sure the new filter is installed securely, with the arrows on the filter pointing in the direction of the airflow. Improper installation may result in reduced filter performance or even damage to your car’s ventilation system.
• Follow manufacturer’s recommendations: Follow any specific instructions provided by the manufacturer, such as replacing any clips or fasteners, to ensure the proper fit of the new filter.

Helpful Tools

You should be able to complete a cabin air filter change with some regular tools you likely already have. However, there are a few tools that are specific to this job that you may not have, and we also want to recommend some general tools that you should for sure have in your toolbox if you don’t already.

• A Vacuum Cleaner / Shop Vac – You can use a handheld vacuum cleaner or shop vac instead of compressed air, but it won’t displace the the debris quite as effectively.
• A Mask – If you have allergies or sensitivities to dust or other allergens, you should wear a mask to protect yourself when removing and replacing the cabin air filter.
• A can of Compressed Air – use this to clean the area around the filter. This will help ensure that the new filter doesn’t immediately get clogged.
• Screwdriver – In some cases, you will need a screwdriver to remove the cover that houses the cabin air filter.