Mahindra BS6 Urea Tank

Mahindra BS6 DEF Urea Tank Assembly 0906AAB00261N

The Mahindra DEF Urea Tank Assembly price 0906AAB00261N is an OEM Diesel Exhaust Fluid (DEF) tank assembly used in the BS6 SCR emission control system of selected Mahindra diesel vehicles. It is commonly referred to as a Mahindra urea tank, DEF tank, AdBlue tank, Diesel Exhaust Fluid tank, urea solution tank or SCR tank.

The DEF tank stores the Diesel Exhaust Fluid/AdBlue/urea solution required by the vehicle's Selective Catalytic Reduction (SCR) system. DEF is injected into the exhaust system, where it helps reduce harmful nitrogen oxide (NOx) emissions and allows the vehicle's BS6 emission system to operate correctly.

Mahindra Part Number: 0906AAB00261N

Compatible Mahindra Vehicles

According to the listed application data, this DEF/urea tank assembly is used in selected variants of:

- Mahindra Bolero 2nd Gen Facelift 1.5L BS6
- Mahindra Bolero Neo 1.5L BS6
- Mahindra Scorpio 3rd Gen Facelift 2.2L BS6
- Mahindra Scorpio Classic 2.2L BS6
- Mahindra Supro 0.9L BS6
- Mahindra Thar 2nd Gen 1.5L BS6
- Mahindra Thar 2nd Gen 2.2L BS6

Compatibility may vary according to vehicle variant, model year, production date and SCR system configuration. Always verify the OEM part number 0906AAB00261N before purchase.

Common Names for This Part

This component may be searched for using different names, including:

Mahindra DEF tank, Mahindra urea tank, Mahindra AdBlue tank, Mahindra Diesel Exhaust Fluid tank, Mahindra SCR tank, Mahindra DEF reservoir, Mahindra urea reservoir, Mahindra AdBlue reservoir, BS6 urea tank, BS6 DEF tank, SCR urea tank, DEF storage tank, Diesel Exhaust Fluid reservoir and urea solution tank.

Common Problems Caused by a Faulty DEF/Urea Tank

A damaged or malfunctioning DEF tank assembly can cause problems in the vehicle's SCR after-treatment system.

Common symptoms may include:

- DEF/AdBlue warning light on the dashboard
- Urea warning message
- Check Engine/MIL warning
- SCR system warning
- DEF level showing incorrectly
- DEF level remaining empty even after filling
- Incorrect DEF/urea level reading
- DEF system malfunction warning
- Urea system fault
- SCR efficiency-related warning
- Engine performance limitation
- Reduced power or limp mode
- Countdown to no-start condition
- AdBlue/DEF system unable to operate correctly
- Difficulty starting after an SCR/DEF fault
- DEF leakage around the tank
- Damaged or cracked urea tank
- Contaminated or crystallized DEF
- Communication faults between DEF components and ECU

Common DEF/Urea Tank Fault Codes

Fault codes depend on the exact Mahindra vehicle, ECU, SCR system and failed component. A DEF tank problem can be associated with faults relating to DEF level, DEF temperature, DEF quality, DEF pressure, tank sensor, wiring, communication or SCR operation.

Possible diagnostic fault-code categories include:

- DEF/urea level sensor fault
- DEF temperature sensor fault
- DEF quality sensor fault
- DEF pressure fault
- DEF tank sensor circuit fault
- DEF tank communication fault
- SCR system fault
- NOx/SCR efficiency fault
- Urea dosing system fault
- DEF supply system fault
- CAN communication fault

Important: A fault code should not automatically be interpreted as a defective DEF tank. The complete SCR system should be diagnosed before replacing the tank assembly.

Causes of Mahindra DEF Tank Problems

Some common causes include:

1. Damaged DEF/urea tank – Physical damage or cracks can cause DEF leakage.
2. DEF contamination – Diesel, water, dirt or other fluids entering the DEF tank can damage the SCR system.
3. Incorrect DEF/urea fluid – Only the correct specification of Diesel Exhaust Fluid should be used.
4. DEF crystallization – Dried DEF can form crystals around connections and components.
5. Faulty tank sensor – A defective level, temperature or quality sensing system can result in incorrect readings.
6. Electrical wiring problem – Damaged wiring, loose connectors, corrosion or poor electrical connections can create sensor faults.
7. CAN communication issue – Communication problems between SCR components and the ECU can trigger warning messages.
8. Frozen DEF – DEF can freeze at approximately -11°C, although the vehicle's DEF system is designed to manage this condition.
9. SCR component failure – The problem may actually be related to the DEF pump, dosing module, NOx sensor, wiring or ECU rather than the tank itself.

Diagnosis and Solution

Before replacing the Mahindra DEF urea tank 0906AAB00261N, perform a complete diagnostic scan using suitable diagnostic equipment.

Step 1 – Scan the ECU

Read the stored and active DTC/fault codes from the engine and SCR/after-treatment system.

Step 2 – Check DEF Level

Check whether the DEF level displayed by the vehicle corresponds with the actual quantity in the tank.

Step 3 – Inspect the Tank

Look for:

- Cracks
- Leakage
- Physical damage
- DEF crystallization
- Damaged connectors
- Damaged pipes and hoses

Step 4 – Check Wiring and Connectors

Inspect the tank sensor wiring, connectors, power supply, ground and CAN communication lines for damage, corrosion or loose connections.

Step 5 – Check DEF Quality

Contaminated or incorrect DEF can cause SCR system problems. If contamination is suspected, the system should be inspected and serviced according to the manufacturer's procedure.

Step 6 – Check Related SCR Components

Do not replace the DEF tank without checking other components such as:

- DEF/urea pump
- Dosing module / urea injector
- NOx sensors
- DEF pressure system
- DEF temperature/level sensing system
- SCR catalyst
- ECU/ECM
- Wiring harness
- CAN communication

Step 7 – Replace the Tank if Confirmed Faulty

If diagnosis confirms that the DEF tank assembly is damaged or its integrated sensing components have failed, replacement with the correct OEM-compatible Mahindra DEF tank 0906AAB00261N may be required.

After replacement, the vehicle may require diagnostic calibration, component replacement programming, DTC clearing or SCR system reset, depending on the vehicle configuration.

Why Does the Mahindra BS6 DEF Warning Come On?

A DEF warning does not always mean that the urea tank is empty. The warning can be triggered by low DEF level, incorrect DEF quality, tank sensor problems, DEF pressure problems, dosing problems, NOx sensor faults, wiring issues or other SCR system faults.

Therefore, the correct approach is to scan the vehicle, identify the DTC and diagnose the complete DEF/SCR system before replacing any component.

Why Is the DEF Level Not Increasing After Filling?

If the DEF tank has been filled but the dashboard still shows low or empty DEF, possible causes include a DEF level sensor fault, tank sensing problem, wiring/connector issue, incorrect fluid detection or ECU/SCR communication problem.

A diagnostic scan and live-data inspection can help identify the cause.

Mahindra DEF Tank Replacement

When replacing the DEF/urea tank, use the correct OEM part number and verify compatibility with the vehicle's model, variant, engine, transmission, model year and production date.

The correct part number for the product described here is:

0906AAB00261N

Product Information

Brand: Mahindra
Manufacturer: Mahindra & Mahindra Ltd.
Part Number: 0906AAB00261N
Product Name: Tank Assy DSL Exhaust Fluid
Product Type: DEF / Urea Tank Assembly
Fuel Type: Diesel
Emission Standard: BS6
Emission System: SCR / Selective Catalytic Reduction
Fluid: Diesel Exhaust Fluid / DEF / AdBlue / Urea Solution
Country of Origin: India
Origin: OEM

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