2009-2012 Audi Diesel Exhaust Fluid Tank / Def Reservoir (PASSIVE) 4L0131877B
OEM Part #: 4L0-131-877-B (4L0131877B)
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The exact part you’ll receive — not a stock photo.
$551.00
Used
Donor2010 Audi Q7 · 3.0L
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Genuine OEM Used
SKU: 685116
Donor Vehicle: 2010 Audi Q7 · 3.0L
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$551.00
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This used Audi OEM Diesel Exhaust Fluid Tank / DEF Reservoir (passive), part 4L0131877B, also replaces 4L0131877A and 4L0131879A, was removed from a donor vehicle. It stores diesel exhaust fluid for the selective catalytic reduction system on Audi Q7 models with the 3.0L V6 TDI diesel engine (2967cc). When the reservoir or its internal level sensor fails, common symptoms include a "DEF low" or "check AdBlue" warning even after refilling, or a fault for DEF system malfunction.
Specifications
| Fits Vehicle Model | Q7 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4L0-131-877-B (4L0131877B) |
| Compatible OEM Part No | 4L0-131-877-A, 4L0-131-879-A |
| Category | Fuel / Emissions |
Compatible Vehicles
Fits 4 vehicle configurations across 1 make, 2009-2012.
Check your specific vehicle before ordering.
This list shows year, make, and model. Some years have multiple trims or
engines that use different parts, and individual listings may have
additional fitment notes (e.g. “with sunroof only”). Review
the full variant list below, or
message us with your VIN
and we’ll confirm the match.
View all 4 vehicle configurations
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2011 | Audi | Q7 | SUV | 3.0L V6 Diesel Turbo | |
| 2012 | Audi | Q7 | SUV | 3.0L V6 Diesel Turbo | |
| 2009 | Audi | Q7 | SUV | 3.0L V6 Diesel Turbo | |
| 2010 | Audi | Q7 | SUV | 3.0L V6 Diesel Turbo |