3M5H-8K218 Volvo C30 08-13 C70 06-13 S40 V50 04-12 Coolant Tank
3M5H-8K218 Volvo C30 08-13 C70 06-13 S40 V50 04-12 Coolant Tank
Factory-fit used Volvo coolant reservoir/header tank with cap. Photographed part marking: 3M5H-8K218. Designed for the engine cooling system to hold expansion coolant, maintain correct coolant level and help prevent air pockets, coolant loss and overheating.
Exact Item Being Sold
Reference Vehicle & Where This Part Fits
Important fitment rule: do not order from model year alone. Match the old tank shape, cap location, hose outlet positions and moulded part number. Send your registration, VIN/chassis number and a photo of your old tank if you are unsure. We can help verify fitment before dispatch.
Part Details & Reference Numbers
Known reference / interchange numbers
Please use these numbers as compatibility search references only. Always compare the actual part number, tank design and pipe layout.
Volvo references: 30776151, 30776150, 30680958, 30722616, 31317575, 31317576, 1303423, 30636701, 30680957, 30722615, 31319477.
FoMoCo / Ford-style moulding references: 3M5H-8K218, 3M5H-8K218-AJ, 3M5H-8K218-AH, 1425193, 1 425 193, 1224268.
Compatibility Table — Please Read Before Buying
| Make / Model | Years | Body / Engine Notes | Fitment Decision |
|---|---|---|---|
| Volvo C30 | 2008-2013 | 3-door hatchback, P1 platform. Match 3M5H-8K218 / 30776151-style tank, cap position and hose outlets. Donor item is photographed as Volvo C30 2008. | Fits when part number and tank layout match |
| Volvo C70 II | 2006-2013 | Convertible, P1 platform. Engine restrictions can apply. Match old tank and part number before buying. | Fits matching P1 C70 applications |
| Volvo S40 II | 2004-2011 / selected 2004-2012 | Saloon. 1.6D D4164T including DRIVe to chassis 577325. 2.4 and T5 petrol models are commonly listed through 2004-2012. Check chassis number carefully. | Fits matching S40 II applications only |
| Volvo V50 | 2004-2011 / selected 2004-2012 | Estate. 1.6D D4164T including DRIVe to chassis 688672. 2.4 and T5 petrol models are commonly listed through 2004-2012. Check chassis number carefully. | Fits matching V50 applications only |
| Ford Focus II / C-Max / Kuga I | Selected 2003-2012 applications | Possible cross-reference where the old tank is marked 3M5H-8K218-AJ / 1425193 and the hose layout is identical. This listing is primarily verified from the Volvo C30 part photos. | Possible only — ask us first with photos |
Will Not Fit / Do Not Buy For These Without Checking
| Vehicle / Situation | Reason |
|---|---|
| Volvo C70 Mk1 1997-2005 | Different generation and different cooling-system layout. |
| Volvo V40 2012-on | Different platform and different tank design. |
| S60, V70, XC70, XC90, XC60, S80 | Only buy if your old part number and tank layout are confirmed identical; these are not the normal listed applications for this tank. |
| Any vehicle with different hose outlets, cap position or sensor layout | Photos and old part number must match. Similar-looking coolant bottles can have different pipe routing and pressure-cap setup. |
| Cars with modified cooling systems | Aftermarket hoses, engine swaps or non-standard cooling systems need manual confirmation before purchase. |
What This Part Does
Where fitted
This coolant expansion/header tank is fitted in the upper engine bay and connects into the engine cooling circuit. It provides a reservoir for coolant expansion, helps maintain the correct coolant level and works with the pressure cap to keep the cooling system operating correctly.
What it controls
This is not an electronic control module. It is a mechanical coolant reservoir that helps manage coolant volume, air bleed/return flow and system pressure through the cap. A poor tank or cap can lead to coolant loss, pressure issues and overheating.
Common Symptoms Of A Faulty Coolant Expansion Tank
Low coolant level, puddles under the front of the vehicle or dampness around the tank and hose outlets.
Temperature gauge rising, cooling fan running more often, steam or hot coolant smell after driving.
Age-related plastic staining, cracks around seams, brittle hose necks or dried coolant residue around the cap.
Hissing, coolant pushing past the cap or failure to hold the correct cooling-system pressure.
Low coolant warning after topping up, especially where a small leak only appears when the system is hot.
Cabin heater may become inconsistent if coolant level drops and air enters the system.
Why Buy A Factory-Fit Used Part?
Better match than cheap copies
A factory-fit used tank is built to the correct vehicle shape, hose angle, mounting position and cap pressure specification. Cheap copy parts can look close in photos but may have poor moulding, weak hose necks, incorrect cap pressure, poor plastic quality or fitment issues that create leaks and extra labour.
Save money and reduce waste
Buying a carefully checked used part can save as much as 70% compared with buying new, while also keeping usable vehicle parts in service and reducing unnecessary manufacturing waste.
Fitting Guide, Tools & Estimated Time
Estimated repair time
DIY / mechanic estimate: 45-75 minutes depending on engine access, hose condition and coolant bleeding time.
Fitting service: We may be able to fit this part subject to availability and appointment slots.
Tools usually required
- Safety gloves and eye protection
- Hose clamp pliers or suitable pliers
- Flat screwdriver or trim/pick tool for hose clips
- Small socket set, commonly 7mm / 8mm / 10mm depending on fixings
- Coolant drain tray and clean rags
- Funnel and correct Volvo-compatible coolant mix
- Replacement hose clips if old clips are weak or corroded
Basic fitting instructions
- Only work on the cooling system when the engine is completely cold. Hot coolant is dangerous and can cause burns.
- Slowly release the pressure cap and catch any coolant in a drain tray. Keep coolant away from children and animals.
- Take photos of the old tank and hose routing before removal.
- Disconnect hoses carefully. Avoid twisting brittle hoses or snapping plastic necks.
- Remove the old tank from its mounts and compare it with this replacement before fitting.
- Install the replacement tank, reconnect hoses fully and secure all clips.
- Refill with the correct coolant mixture, bleed the cooling system using the correct procedure for your vehicle and run the heater on hot.
- Run the engine, check for leaks, allow the car to cool and re-check coolant level before driving normally.
No-Script Garage Labour Cost Estimator
eBay descriptions cannot use JavaScript, so this is a safe static calculator table. Estimated labour cost = hourly rate multiplied by estimated repair time. Parts and coolant are not included.
| Garage hourly rate | 45 minutes estimate | 60 minutes estimate | 75 minutes estimate |
|---|---|---|---|
| £45 per hour | £33.75 | £45.00 | £56.25 |
| £60 per hour | £45.00 | £60.00 | £75.00 |
| £75 per hour | £56.25 | £75.00 | £93.75 |
| £90 per hour | £67.50 | £90.00 | £112.50 |
| £120 per hour | £90.00 | £120.00 | £150.00 |
We also offer fitting/repair services subject to availability. Message before travelling or booking so we can confirm time slot, vehicle access and any coolant required.
ThePartPilot Stock, Fitting & Dispatch
Delivery, Collection & Address Checks
UK & worldwide postage
We offer worldwide postage through the eBay Global Shipping Programme where available at checkout. This used coolant tank is supplied drained/dry with no coolant fluid included.
Checkout address warning: please make sure your eBay checkout address is correct before payment. We cannot change the delivery address after checkout.
Collections
Collections are available 7 days a week until 8pm by appointment, including bank holidays by prior appointment. Please do not travel until your appointment is confirmed.
We are a local small business with a large on-shelf parts stock and quick collection options for urgent repairs.
eBay Global Shipping Programme eligible countries
Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Antigua and Barbuda, Aruba, Australia, Bahamas, Bahrain, Bangladesh, Barbados, Belize, Bermuda, Bolivia, Brazil, Brunei Darussalam, Cambodia, Canada, Cayman Islands, Chile, China, Colombia, Costa Rica, Dominica, Dominican Republic, Ecuador, Egypt, El Salvador, French Guiana, Grenada, Guadeloupe, Guatemala, Guernsey, Honduras, Hong Kong, Iceland, Indonesia, Israel, Jamaica, Japan, Jersey, Jordan, Kuwait, Liechtenstein, Macau, Malaysia, Maldives, Martinique, Mexico, Monaco, Montserrat, New Zealand, Nicaragua, Norway, Oman, Pakistan, Panama, Paraguay, Peru, Philippines, Qatar, Reunion, Saint Kitts and Nevis, Saint Lucia, Saudi Arabia, Singapore, South Africa, South Korea, Sri Lanka, Switzerland, Taiwan, Thailand, Trinidad and Tobago, Turks & Caicos Island, UAE, Ukraine, Uruguay, USA, Vietnam.
Returns, Fitment Verification & VAT
Order the correct part first time
We provide actual item photos, part number photos and a compatibility chart to help customers order correctly. Please compare your old part to the images rather than relying only on eBay item specifics.
If unsure, send us your registration, VIN/chassis number and a clear photo of your old expansion tank before buying.
Return condition
Incorrectly ordered parts returned as “does not fit” or “not as described” after published fitment information has been ignored may be inspected and may be subject to handling/restocking deduction up to 50% where permitted by eBay policy and consumer law.
We always aim to verify fitment before dispatch where customers provide enough information.
We operate under the Global VAT Scheme, so no separate VAT is charged or itemised on this used part.
How To Contact Us For Collection, Fitting Or Fitment Help
Scan for WhatsApp
Scan the QR code and message for fitment checking, collection appointments, fitting availability and repair enquiries.
Please include your vehicle registration, VIN/chassis number, engine size and a photo of your old part.
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