Genuine OEM 18307812171 - Diesel Particulate Filter (DPF) Gasket

Product Overview

This Genuine OEM 18307812171 diesel particulate filter gasket is a factory-specification replacement component for BMW 335d and X5 xDrive35d models equipped with 3.0-liter turbodiesel engines. The gasket seals the connection between the DPF assembly and the exhaust system, preventing exhaust leaks and maintaining proper back-pressure for emissions control. This part fits E90 and E70 chassis models from 2009 to 2018. Genuine OEM parts ensure exact fitment and are backed by BMW dealership warranty coverage.

Symptoms of a Failing DPF Gasket

• Exhaust odor or visible smoke from the DPF assembly area
• Check Engine light or emissions-related fault codes
• Loss of turbocharger boost or reduced engine performance
• Hissing or whistling sounds near the exhaust manifold
• Increased diesel particulate filter regeneration cycles

Cross Reference Numbers

This Genuine OEM 18307812171 is equivalent to or replaces the following part numbers: 18307812171, 18-30-7-812-171.

Vehicle Compatibility

This part fits the popular models below. For Fitment Confidence, please use the vehicle selector tool above to verify exact compatibility for your vehicle.

• BMW 335d 3.0 L6 Diesel (E90): 2009–2011
• BMW X5 xDrive35d 3.0 L6 Diesel (E70): 2009–2011
• BMW X5 xDrive35d 3.0 L6 Diesel (F15): 2012–2018

This may also fit other applications. Please use the vehicle selector tool to verify fitment.

Often Replaced Together

For a complete DPF service, many owners replace the following at the same time:

• DPF inlet and outlet gaskets as a set
• Exhaust manifold gasket if leakage is present
• DPF pressure sensor and lines
• Turbocharger gaskets and seals

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Frequently Asked Questions

How do I know if my BMW 335d or X5 xDrive35d DPF gasket is failing?

Common signs include exhaust leaks around the DPF assembly, a Check Engine light related to emissions, reduced turbocharger boost, or a noticeable increase in DPF regeneration cycles. If you see white or gray smoke from the exhaust or smell diesel fumes near the DPF, the gasket has likely failed and should be replaced.

What is the difference between a DPF inlet gasket and outlet gasket?

The inlet gasket seals where the exhaust manifold or turbo connects to the DPF canister, while the outlet gasket seals where the DPF exits to the rest of the exhaust system. Both prevent exhaust leaks that would compromise emissions control and engine performance. Many technicians replace both simultaneously during DPF service.

Can I replace just the gasket, or do I need a new DPF assembly?

If the gasket is the only problem—evidenced by exhaust leaks around the DPF housing and no fault codes indicating internal filter blockage—replacing the gasket alone is sufficient. However, if the DPF itself is clogged or internally damaged, you will need to replace the entire assembly. A diagnostic scan will help determine the root cause.

How long does DPF gasket replacement take?

Gasket replacement typically requires 1 to 2 hours of labor, depending on whether the DPF must be partially removed for access. You will need basic hand tools, a torque wrench, and potentially a lift or jack stands for safe vehicle support. Consult your service documentation for exact torque specifications.

Is this a Genuine BMW part?

Yes, Genuine OEM 18307812171 is the factory BMW specification gasket. It is manufactured to exact tolerances and is the part installed on new vehicles at the factory. Using Genuine parts ensures proper sealing, longevity, and maintains emissions compliance.

Will replacing the DPF gasket fix my Check Engine light?

If the fault code is specifically related to an exhaust leak at the DPF (such as a lean condition code), replacing the gasket will resolve the issue once the code is cleared. However, if the code indicates DPF blockage or a sensor malfunction, the gasket replacement alone will not fix it. Proper diagnosis is essential.

Order Genuine OEM 18307812171 today. In-stock orders ship same or next business day from our U.S. warehouse, and our fitment team is one call away if you need help confirming the right part for your BMW 335d or X5.

Note: All information on this page and in the FAQ is for general reference only. Verify fitment and consult a professional as needed. eEuroparts.com is not responsible for incorrect part selection or installation.