- Shop with confidence: competitive prices, exclusive deals, and delivery perks.
- Need it quickly? We dispatch fast-moving parts daily. Check delivery options.
- Swap or return items within the standard return period with a simple process.
- Questions about fitment or orders? Our support team is ready to help.
Similar products
Customers also bought
Details
| Specification | Value |
|---|---|
| Brand | NTY |
| MPN | czw-bm-031 |
| Category | coolant expansion tank |
| for OE number | 17 13 7 647 284 |
| Fabrication Number | CZW-BM-031 |
OE numbers (3)
Search by this OE number to find compatible parts
- BMW—17 13 7 578 439
- BMW—17 13 7 601 950
- BMW—17 13 7 647 284
Where this part fits
Original-fit position for OE 17137647284. The red ring marks where this part installs on the vehicle.
About this product
When coolant expansion tank performance matters, the NTY CZW-BM-031 delivers — built to the same dimensional and material standards as the original part it replaces. The part is built to the following specification: for OE number: 17 13 7 647 284, Colour: Ceramic, Material: Plastic, Fabrication Number: CZW-BM-031. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Compatible with BMW 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: 001-10-22799, 03303, 053022N, 08.40.072 and 45 more. Matching these numbers confirms a like-for-like replacement with no loss of function. NTY 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 (47)
Show all 47 OE numbers
coolant expansion tank NTY CZW-BM-031 — compatible car models
| Car models | BMW: 5 (F10), 5 Touring (F11), 7 (F01, F02, F03, F04) |
|---|---|
| Engines | 523 i; 730 i, Li |
| Year of manufacture | 2008-2017 |
| Manufacturer article number (MPN) | CZW-BM-031 |
| OE part numbers | 17 13 7 578 439, 17 13 7 601 950, 17 13 7 647 284 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
NTY czw-bm-031 coolant expansion tank. Colour: 7. Fabrication Number: CZW-BM-031. for OE number: 17 13 7 647 284. Material: 6
- 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 BMW 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 NTY coolant expansion tank have?
This NTY coolant expansion tank has the following specifications: for OE number: 17 13 7 647 284; Colour: 7; Material: 6; Fabrication Number: CZW-BM-031. 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: 17 13 7 578 439, 17 13 7 601 950, 17 13 7 647 284. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a coolant expansion tank cost?
This NTY coolant expansion tank is available for £59.99. Coolant expansion tank prices vary depending on brand, specifications, and vehicle compatibility. NTY 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 17 13 7 578 439?
Yes, this NTY coolant expansion tank is a direct replacement for OE part number 17 13 7 578 439. 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.
