Description
xThe Genuine Bentley Expansion Tank 4M0121405AG stores excess coolant as temperatures fluctuate. This reservoir accommodates fluid expansion during heating. Your cooling system requires this for proper function.
The tank connects to the main cooling circuit through hoses. When fluid heats and expands, overflow goes here. As temperatures drop, the vacuum draws fluid back.
Translucent construction lets you verify fluid levels visually. Moulded minimum and maximum markings show proper fill range. You check levels without opening anything.
Heat-resistant plastic withstands underhood temperatures without warping. The material resists antifreeze chemical attack. Cheap tanks crack and leak from thermal stress.
The cap opening accommodates the pressure-regulating cap. Smooth threads ensure proper sealing without leaks. Damaged threads prevent the cap from sealing correctly.
You receive the exact tank Bentley specified for your vehicle. It holds adequate capacity for your cooling system volume. Everything functions as designed without overflow.
Order from Europeanautospares for genuine Bentley components with dependable worldwide shipping.
Specifications
- Brand: Bentley
- Part Number: 4M0121405AG
- Type: Expansion Tank (Coolant Reservoir)
- Material: OEM heat-resistant plastic
- Application: Cooling system
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Condition: Brand New, Genuine OEM
Why Choose European Auto Spares
Adequate Capacity: This tank holds sufficient volume for thermal expansion.
Visual Monitoring: A translucent material allows easy level verification.
Heat Resistant: Plastic withstands underhood temperatures without warping.
Chemical Resistant: Material resists attack by antifreeze and deterioration.
Worldwide Fast Shipping: We deliver authentic components to you rapidly.
Need Help Finding the Right Bentley Part?
Our cooling specialists help you identify the correct tank for your vehicle. Contact Europeanautospares with your vehicle information to verify the precise part today.
We confirm compatibility before processing your request. Your OEM tank arrives in authentic packaging, ready to install. Professional assistance is available anytime you require it.
Keep Your Bentley Cooling Contained
Cracked tanks leak coolant that causes overheating. Replace damaged units with the Genuine Bentley Expansion Tank 4M0121405AG now.
This authentic tank restores proper fluid storage to factory standards. Order today from Europeanautospares and maintain cooling capacity.
Fitment Details
xCondition: Brand New, Genuine OEM
Bentley Coolant Reservoir / Expansion Tank Fitment
| Model | Application |
|---|---|
| Bentley Bentayga [2016–2023] | A coolant reservoir that stores excess coolant |
| Bentley Bentayga V8 [2018–2023] | Maintains proper coolant level and pressure |
| Bentley Bentayga W12 [2016–2022] | Helps manage engine cooling efficiently |
Fitment may vary depending on model year, engine configuration, and regional specifications. Please provide your VIN to confirm exact compatibility before purchase.
FAQs
xFrequently Asked Questions – Coolant Expansion Tank
Stores excess coolant during thermal expansion and supplies it back during contraction.
Visible cracks, leaking seams, or damaged cap threads.
Lost fluid reduces system capacity, causing inadequate heat removal.
Send your VIN for exact compatibility confirmation.
Inspect connecting hoses and replace any showing cracks or softness.
Found It Cheaper.?
xShipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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