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Details
| Specification | Value |
|---|---|
| Brand | METZGER AUTOTEILE |
| Category | coolant expansion tank |
OE numbers (4)
Search by this OE number to find compatible parts
- AUDI—4G0 121 403 AC
- AUDI—4G0 121 403 AG
- AUDI—4G0 121 403 D
- AUDI—4G0 121 403 G
Where this part fits
Original-fit position for OE 4G0121403AC. The red ring marks where this part installs on the vehicle.
About this product
When coolant expansion tank performance matters, the METZGER AUTOTEILE 2140185 delivers — built to the same dimensional and material standards as the original part it replaces. The part is built to the following specification: Supplementary Article/Supplementary Info: 896, Supplementary Article/Info 2: 288, Article number of recommended accessories: 2140060. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Compatible with AUDI vehicles; use the vehicle selector above to confirm exact fitment for your make, model, and engine variant. Fitment data is sourced from TecDoc, the authoritative European parts catalogue. This part supersedes original equipment references: 001-10-31973, 003-026-008, .005.4870, 043032N and 56 more. Matching these numbers confirms a like-for-like replacement with no loss of function. METZGER AUTOTEILE is a recognised supplier of automotive replacement components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched with tracked delivery and a 14-day money-back guarantee with hassle-free returns.
Suitable cars
Equivalent products (57)
Show all 57 OE numbers
coolant expansion tank METZGER AUTOTEILE 2140185 — compatible car models
| Car models | AUDI: A6 Allroad C7 (4GH, 4GJ), A6 C7 (4G2, 4GC), A6 C7 Avant (4G5, 4GD), A7 Sportback (4GA, 4GF) |
|---|---|
| Engines | 3.0 TDI quattro; 1.8 TFSI |
| Year of manufacture | 2010-2019 |
| Manufacturer article number (MPN) | 2140185 |
| OE part numbers | 4G0 121 403 AC, 4G0 121 403 AG, 4G0 121 403 D, 4G0 121 403 G |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
METZGER AUTOTEILE 2140185 GREENPARTS. Article number of recommended accessories: 2140060. Supplementary Article/Info 2: 288. Supplementary Article/Supplementary Info: 896
- 1x coolant expansion tank
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 4–8 business days
- Order before 5pm — ships the next working day
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this coolant expansion tank compatible with my car?
This coolant expansion tank fits AUDI vehicles. Use the vehicle selector at the top of the page to check exact compatibility — enter your car's make, model, and engine for a confirmed fitment match. All fitment data is verified through TecDoc.
What specifications does this METZGER AUTOTEILE coolant expansion tank have?
This METZGER AUTOTEILE coolant expansion tank has the following specifications: Supplementary Article/Supplementary Info: 896; Supplementary Article/Info 2: 288; Article number of recommended accessories: 2140060. Check the full specifications table above for complete details.
What OE part numbers does this coolant expansion tank replace?
This coolant expansion tank replaces OE part numbers: 4G0 121 403 AC, 4G0 121 403 AG, 4G0 121 403 D, 4G0 121 403 G. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a coolant expansion tank cost?
This METZGER AUTOTEILE coolant expansion tank is available for £39.99. Coolant expansion tank prices vary depending on brand, specifications, and vehicle compatibility. METZGER AUTOTEILE parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my coolant expansion tank?
Regular inspection of your coolant expansion tank is recommended as part of routine vehicle maintenance. Watch for changes in performance, unusual noises, or visual signs of wear. Consult your vehicle's owner manual for manufacturer-recommended replacement intervals specific to your make and model.
What tools do I need to replace a coolant expansion tank?
Tools needed: hose clamp pliers, flat-head screwdriver, 8mm socket, coolant top-up bottle. Difficulty: Easy DIY. Safety warning: Only open the expansion tank cap when the engine is completely cold -- coolant system is under pressure when hot and will spray scalding fluid if opened.
Can I use this part as a replacement for OE 4G0 121 403 AC?
Yes, this METZGER AUTOTEILE coolant expansion tank is a direct replacement for OE part number 4G0 121 403 AC. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Is the METZGER AUTOTEILE 2140185 the same as the METZGER AUTOTEILE 2140004?
No, while both are coolant expansion tank parts, they are different products. The METZGER AUTOTEILE 2140185 has Supplementary Article/Supplementary Info: 896, Supplementary Article/Info 2: 288, Article number of recommended accessories: 2140060. The METZGER AUTOTEILE 2140004 may differ in dimensions, fitting position, or material composition. Always verify compatibility with your specific vehicle using our vehicle selector, or contact our customer service team for assistance.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
