Genuine OEM 16197244138 - Diesel Exhaust Fluid (DEF) Tank (Right)

Product Overview

This Genuine OEM 16197244138 Diesel Exhaust Fluid (DEF) tank is the factory-specification right-side tank for BMW X5 xDrive35d models equipped with 3.0L turbodiesel engines. The DEF tank stores aqueous urea solution required by the selective catalytic reduction (SCR) system to reduce nitrogen oxide emissions and meet EPA standards. This is a direct OEM replacement that ensures proper fitment, durability, and compatibility with your vehicle's emissions control system.

This DEF tank is sold individually. Verify that your vehicle requires a right-side tank replacement before ordering.

Symptoms of a Failing DEF Tank

• DEF warning light illuminated on the dashboard
• Reduced engine performance or limp-mode activation
• Visible cracks, leaks, or fluid seepage beneath the vehicle
• Difficulty starting the engine or rough idle
• Foul odor near the fuel or emissions system area

Cross Reference Numbers

This Genuine OEM 16197244138 is equivalent to or replaces the following part numbers: 16-19-7-244-138, 16197244138.

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 X5 xDrive35d 3.0 L6 Diesel (E70): 2009–2013

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

Often Replaced Together

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

• DEF pump and injector assembly
• SCR catalyst substrate
• DEF supply hose and clamps
• Engine air filter (routine maintenance)

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Frequently Asked Questions

How do I know if my BMW X5 xDrive35d DEF tank needs replacement?

Watch for a persistent DEF warning light on your dashboard, visible leaks or cracks in the tank area beneath the vehicle, or a noticeable reduction in engine performance. If the SCR system cannot detect adequate DEF levels, the engine may enter limp mode to protect the catalyst. Have the system scanned with a diagnostic tool to confirm whether the tank itself is faulty or if the issue is with the level sensor or pump.

What is DEF and why does my diesel BMW need it?

Diesel Exhaust Fluid (DEF) is a 32.5% aqueous urea solution that works with the selective catalytic reduction (SCR) system to convert harmful nitrogen oxides (NOx) into harmless nitrogen and water. This system is required on all diesel vehicles sold in the United States since 2010 to meet EPA Tier 2 Bin 5 emissions standards. Your X5 xDrive35d cannot operate without a functioning DEF system.

Is this a left-side or right-side tank, and does my vehicle have one or two tanks?

This is the right-side DEF tank. Most BMW X5 diesel models use a single DEF tank positioned on the right side of the vehicle. Before ordering, confirm your specific model year and check your vehicle's documentation or use the fitment tool to ensure you are replacing the correct tank.

How long does it take to replace the DEF tank, and what tools do I need?

DEF tank replacement typically requires removal of undercarriage trim, disconnection of the supply hose and electrical connector, and unbolting the tank from its mounting bracket. The job usually takes 1 to 2 hours for a professional technician. You will need a basic socket set, jack and jack stands, and a hose clamp tool. If you are unfamiliar with emissions system work, professional installation is recommended to avoid damaging the DEF pump or SCR system.

Will a Genuine OEM DEF tank last longer than an aftermarket alternative?

Genuine OEM parts are engineered to exact factory specifications and are built with the same materials and quality control as the original tank. They carry the full OEM warranty and are guaranteed to work seamlessly with your vehicle's emissions and fuel management systems. While aftermarket alternatives may cost less, OEM tanks eliminate compatibility concerns and provide peace of mind for long-term reliability.

What should I do after replacing the DEF tank?

After installation, fill the tank with fresh DEF fluid (do not reuse old fluid from the old tank). Clear any diagnostic trouble codes using a professional scanner, and verify that the DEF warning light extinguishes and the system functions normally. Some vehicles may require a brief drive cycle to fully reset the emissions system. Consult your service manual or a BMW technician if warning lights persist after replacement.

Order Genuine OEM 16197244138 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 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.