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Description
Expansion Tank for Audi A4 / S4 B6, A4 / S4 B6 Avant & A4 / S4 B7 - 121843Vehicle Fitment & Part Details The Expansion Tank is listed for the Audi A4 S4 B6 (2001 2005). Confirm compatibility by matching the listed fitment details. Verify VIN engine. Key Details SKU 121843 Component Expansion Tank Primary Fitment Audi A4 S4 B6 (2001 2005) Vehicle Fitment Includes 26 supplied applications covering Audi. Use the full table below to confirm model, chassis, year range, engine and power before ordering. View Full Vehicle Fitment
Vehicle Fitment & Part Details
The Expansion Tank is listed for the Audi A4 / S4 B6 (2001-2005). Confirm compatibility by matching the listed fitment details. Verify VIN/engine.
Key Details
- SKU
- 121843
- Component
- Expansion Tank
- Primary Fitment
- Audi A4 / S4 B6 (2001-2005)
Vehicle Fitment
Includes 26 supplied applications covering Audi. Use the full table below to confirm model, chassis, year range, engine and power before ordering.
View Full Vehicle Fitment (26 applications)
| Make | Model | Chassis | Years | Engine | Power |
|---|---|---|---|---|---|
| Audi | A4 / S4 B6 | 8E2 | 2001-2005 | 1.8 T BEX | 140 kW / 190 HP |
| Audi | A4 / S4 B6 | 8E2 | 2001-2005 | 1.8 T BFB | 120 kW / 163 HP |
| Audi | A4 / S4 B6 | 8E2 | 2001-2005 | 1.9 TDI AVF; AWX | 96 kW / 130 HP |
| Audi | A4 / S4 B6 | 8E2 | 2001-2005 | 2.0 ALT | 96 kW / 130 HP |
| Audi | A4 / S4 B6 Avant | 8E5 | 2002-2005 | 1.8 T BEX | 140 kW / 190 HP |
| Audi | A4 / S4 B6 Avant | 8E5 | 2002-2005 | 1.8 T BFB | 120 kW / 163 HP |
| Audi | A4 / S4 B6 Avant | 8E5 | 2002-2005 | 1.9 TDI AVF; AWX | 96 kW / 130 HP |
| Audi | A4 / S4 B7 | 8EC | 2005-2009 | 1.8 T BFB | 120 kW / 163 HP |
| Audi | A4 / S4 B7 | 8EC | 2005-2009 | 2.0 ALT | 96 kW / 130 HP |
| Audi | A4 / S4 B7 | 8EC | 2005-2009 | 2.0 TDI BRD | 125 kW / 170 HP |
| Audi | A4 / S4 B7 | 8EC | 2005-2009 | 2.0 TDI 16V BLB; BRE | 103 kW / 140 HP |
| Audi | A4 / S4 B7 | 8EC | 2005-2009 | 2.0 TFSI BGB; BWE | 147 kW / 200 HP |
| Audi | A4 / S4 B7 | 8EC | 2005-2009 | 2.0 TFSI quattro BGB; BPG; BWE | 147 kW / 200 HP |
| Audi | A4 / S4 B7 | 8EC | 2005-2009 | 3.2 FSI AUK | 188 kW / 255 HP |
| Audi | A4 / S4 B7 | 8EC | 2005-2009 | 3.2 FSI quattro AUK | 188 kW / 255 HP |
| Audi | A4 / S4 B7 Avant | 8ED | 2005-2008 | 1.8 T BFB | 120 kW / 163 HP |
| Audi | A4 / S4 B7 Avant | 8ED | 2005-2008 | 2.0 ALT | 96 kW / 130 HP |
| Audi | A4 / S4 B7 Avant | 8ED | 2005-2008 | 2.0 TDI 16V BLB; BRE | 103 kW / 140 HP |
| Audi | A4 / S4 B7 Avant | 8ED | 2005-2008 | 2.0 TFSI BGB; BPG; BWE | 147 kW / 200 HP |
| Audi | A4 / S4 B7 Avant | 8ED | 2005-2008 | 2.0 TFSI quattro BUL | 162 kW / 220 HP |
| Audi | A4 / S4 B7 Avant | 8ED | 2005-2008 | 3.2 FSI AUK | 188 kW / 255 HP |
| Audi | A4 / S4 B7 Avant | 8ED | 2005-2008 | 3.2 FSI quattro AUK; BKH | 188 kW / 255 HP |
| Audi | A4 / S4 B7 Convertible | 8HE | 2006-2010 | 2.0 TFSI 16V BWE | 147 kW / 200 HP |
| Audi | A4 / S4 B7 Convertible | 8HE | 2006-2010 | 3.2 FSI quattro AUK; BKH | 188 kW / 255 HP |
| Audi | A6 / S6 C5 | 4B2, 4B4 | 1997-2004 | 1.8 T AEB; ANB; APU; ARK; AWT | 110 kW / 150 HP |
| Audi | A6 / S6 C5 | 4B2, 4B4 | 1997-2004 | 1.9 TDI AVF; AWX | 96 kW / 130 HP |
Fitment Notes
- Always match vehicle details before ordering. Verify VIN/engine.
Compatibility Verification Notes
- Confirm compatibility using VIN, engine code, chassis / platform, OE reference and original part comparison before ordering.
- Match the supplied fitment details to your vehicle, including model, year range and any listed engine or chassis information.
- Fitment data may vary by production date, market, import history and engine variant.
- This listing is for part identification and compatibility checking only. Installation must be carried out according to the vehicle manufacturer's service information by a suitably qualified person.
Common Questions
Will the Expansion Tank fit my Audi A4 / S4 B6?
This part (121843) is listed for the fitments shown on this page. Confirm by matching the fitment details. Verify VIN/engine.
How do I confirm fitment if there are multiple variants?
Compare the supplied fitment details, original part details and any listed variant information before ordering. Verify VIN/engine.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 411 reviews
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Product Reviews
★★★★★ 5
From a Long Time Hard Sole Dress Shoe Wearer, These are a Must Have!
Size: 12, Color: Blue
I have been wearing hard sole dress shoes for decades and with the full COVID shift to dressing super casual in a professional work environment, I was in the market for some more casual let dressy shoes that were a heck of a lot more comfortable and flexible than my hard soles so I thought I would give this brand and style a try. Oh man, I'm in love. These give you that dressier look yet you can totally dress them down with jeans or cordouroys, so versatile. As I did with my hard soles, I inserted one of my Nike Air in soles and man, these are so comfortable I bought navy and brown! I usually wear these with thin dress socks and they go perfectly with any type of suit set, a no brainer purchase here. I'm a 12 and bought a 12, perfect fit, not to skinny, not to wide, just right. Bottom sole grip is impressive, never felt unstable, solid rubber sole here. I decided to lace them up so there are not tying and the tongue does slip down sometimes so with this feature, best to use a metal shoe horn, then it's super easy to slide them on, they seem to take a beating and remain clean too, I've definitely scuffed them up against many things and still no damage, it's crazy, must have a great finish. NOTE TO Note to MANUFACTURER/SELLER - You need to make a version in GRAY in this specific style and I will buy them instantly, and I assure you they will be incredibly popular! Really not sure why there isn't more colors in these like gray, shades of gray, maybe red, lighter blue and maybe some with different tones in standard colors. Casual dress shoe wearers are looking for new and exciting bold colors so this is the perfect shoe type to deliver on that.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 6, 2024
★★★★★ 5
Finally, a dress shoe that actually feels like a sneaker!
Size: 8.5, Color: Dark Brown
I was honestly super skeptical about buying shoes on Amazon, especially "dress sneakers." Usually, they either look incredibly cheap in person or they completely destroy your heels within an hour. I am so glad I took a chance on these Bruno Marcs.
I commute to campus and take the bus almost every day, so I end up doing a ton of walking. I needed something that looked sharp and put-together, but I absolutely refused to sacrifice comfort for a long day on my feet. These completely hit the mark. Right out of the box, there was zero break-in period—no stiffness, no pinching, and no blisters.
They are incredibly lightweight, and the material actually looks premium, not like that shiny, fake plastic you sometimes get at this price point. The traction on the bottom is surprisingly good too, which is a lifesaver when I'm rushing to catch my bus on rainy mornings.
If you’re on the fence, just get them. It’s rare to find a shoe that balances looking professional with feeling exactly like your favorite weekend sneaker. Easily one of the best wardrobe purchases I've made in a while!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 4, 2026
★★★★★ 4
High quality, perfect color and very nice price!
Size: 14, Color: Brown, Size: 14, Color: Brown
I bought this shoes for my husband's Christmas present, so he didn't try yet. So far, the color is perfect! I feel like he can wear this shoes with different outfits, for the price it seems hight quality, it is not heavy at all.
The shoe features a soft, comfortable lining and the sole is perfect because it is non-slip.
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Reviewed in the United States on December 4, 2025
★★★★★ 5
Squeaky
Size: 8, Color: Black
They look incredible. But they're a little squeaky. Otherwise my husband loves the comfort. They go with any outfit
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026
★★★★★ 5
These fit very nicely, are comfortable, and work for my wide feet!
Size: 12 Wide, Color: Brown
Once I learned while shoe shopping in my youth that I needed wide-sized shoes, I wasn't able to easily choose from any shoes I saw in the store. I usually have to go find the wide widths and have to deal with the limited styles they have. Shopping online has been hit and miss, too. Sometimes, shoes are advertised as wide width, but end up still being too narrow.
These shoes fit me just right. They were not too tight at the toes, gave good width at the arch, and the opening was large enough that I didn't have to undo every single lace just to get my foot in. They also look nice, and I'm sure will take a decent polish.
Also, note that this does say it's an Oxford shoe, but it does have the open lacing and is more of a derby-style shoe. This also helps with sizing for my wide feet. If I didn't already have a pair of black shoes, I'd look at picking one of these up.
My only reservation with these is that the soles are not dark-colored to complement a more formal style. I feel the white makes them a little more casual. The sole is also more transparent/opaque coloring at the heel and underneath, which you can kind of see-through, so keep that in mind. It's not fully clear, but is kind of transparent, which I was not expecting. I think it also shows where it picks up dirt as you wear it. Just more of a style cue one way or another.
As a reference, I buy the 4E wide and Extra Wides in New Balance and Skechers. I also have a hard time getting any good fit in Nike shoes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 2, 2023
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