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Details
| Specification | Value |
|---|---|
| Brand | AIC |
OE numbers (1)
Search by this OE number to find compatible parts
- AUDI / VAG / VW—048 121 121B
Where this part fits
Original-fit position for OE 048121121B. The red ring marks where this part installs on the vehicle.
About this product
Sourced from AIC, this coolant flange (50058) combines precision engineering with durable materials to meet the demands of everyday driving and extended service intervals. Verified to fit AUDI, VW models. All compatibility data is cross-checked against the TecDoc database — select your vehicle to confirm the part matches your specific engine and year. This part supersedes original equipment references: 03593, 048 121 121B, 07069, 07.19.042 and 37 more. Matching these numbers confirms a like-for-like replacement with no loss of function. AIC 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.
Coolant Flange buying guide
Why replace this part?
Coolant outlet flanges and pipe connectors direct coolant flow through the engine circuit. Plastic flanges crack from thermal cycling; metal flanges develop pinhole corrosion. Either causes coolant loss and overheating.
Signs you need a replacement
- Coolant leak at a pipe junction on the engine
- white crystalline deposit around a fitting
- rapid coolant consumption
- overheating
- steam under the bonnet
When to replace
Inspect every 60,000–80,000 miles. Plastic flanges are a known weak point — replace proactively during major cooling system work.
Suitable cars
Equivalent products (42)
Show all 42 OE numbers
Coolant Flange AIC 50058 — compatible car models
| Car models | AUDI: 100 C4 Avant (4A5), 100 C4 Saloon (4A2), 80 B4 Avant (8C5), 80 B4 Saloon (8C2), A4 B5 (8D2), A4 B5 Avant (8D5), A6 C4 (4A2), A6 C4 Avant (4A5), A6 C5 (4B2, 4B4), A6 C5 Avant (4B5, 4B6) (+2 more); VW: PASSAT B5 (3B2), PASSAT B5 Variant (3B5) |
|---|---|
| Engines | 2.0 E; 2.0; 1.6 E; 1.6; 1.9 TDI |
| Year of manufacture | 1988-2006 |
| Manufacturer article number (MPN) | 50058 |
| OE part numbers | 048 121 121B |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
AIC 50058 Original AIC Quality
- 1x Coolant Flange
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 5–9 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 Flange compatible with my car?
This Coolant Flange fits AUDI, VW 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 AIC Coolant Flange have?
The package includes the Coolant Flange as described in the specifications above. Check the "What's included" section for a full list of components. If mounting hardware or accessories are required, they will be listed separately.
What OE part numbers does this Coolant Flange replace?
This Coolant Flange replaces OE part numbers: 048 121 121B. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Coolant Flange cost?
This AIC Coolant Flange is available for £4.99. Coolant Flange prices vary depending on brand, specifications, and vehicle compatibility. AIC 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 Flange?
Regular inspection of your Coolant Flange 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 Flange?
Tools required vary by vehicle make and model. Generally, a basic socket set, screwdrivers, and vehicle-specific tools may be needed. We recommend consulting a workshop manual for your specific vehicle, or having the Coolant Flange fitted by a professional mechanic.
Can I use this part as a replacement for OE 048 121 121B?
Yes, this AIC Coolant Flange is a direct replacement for OE part number 048 121 121B. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
