Automotive replacement part designed to restore the cooling system seal for many Vauxhall and Opel models, BIAREN Radiator Expansion Water Tank Cap. Restoring a reliable seal brings the reassurance of fewer breakdowns and less worry on daily journeys. Will the listed OEM numbers and fitments match your car and stop leaks for good?
⚡ At a Glance
- • Sealing Performance: Users report a secure, leak-free seal that restores coolant retention and prevents escape from the expansion tank
- • Best for: Owners of the listed Vauxhall and Opel models who need a direct replacement for a worn or leaking expansion cap
- • Not ideal for: Vehicles not included in the fitment list or applications requiring a manufacturer-specified pressure rating
Matches OEM numbers 13502353, 13598760 and 1305248 and fits a wide range of Vauxhall/Opel models. Supplied as one plastic cap, check your old part photo and OEM number before buying.
Direct replacement fit, with OEM-number matching design
Design corresponds to OEM numbers 13502353, 13598760 and 1305248, ensuring the cap seats correctly on the expansion tank neck and aligns with existing mounting features. Correct seating reduces play that can cause leaks.
Quick swap-in replacement for compatible Vauxhall and Opel cars, typically fitting without modification and saving installation time.
Reduced leak risk, with plastic construction shaped to match the OEM cap
Manufactured from plastic, the cap follows the original cap geometry so that the sealing surfaces meet the tank inlet as intended. Consistent contact reduces the chance of coolant weeping at the joint.
Many users report no leaks after fitting, making this a practical way to stop coolant loss and avoid frequent top-ups.
Helps tackle overheating, thanks to restored coolant retention
A worn or faulty expansion cap can allow coolant to escape and lower system fluid levels; replacing a faulty cap restores the tank's ability to retain coolant and maintain system condition. Proper retention reduces the likelihood of the cooling system running low on fluid.
Customer feedback indicates fewer overheating incidents following replacement, which can prevent more extensive engine damage and costly repairs.
✨ The 4 Key Reasons for BIAREN Radiator Expansion Water Tank Cap
- OEM-number match - Ensures direct replacement fit for multiple listed Vauxhall and Opel models
- Plastic construction - Practical material that resists coolant exposure and ageing
- Single-piece supply - Supplied as one cap for quick, straightforward replacement with minimal tools
- User-verified reliability - Customer reports show correct fit and reduced overheating incidents
📋 Technical Details at a Glance
- Brand: BIAREN
- Category: Radiator expansion tank cap
- Compatible Models: Vauxhall/Opel Corsa D (2006-2014), Corsa E (2014-2018), Astra J (2009-2015), Astra K (2015-2020), Insignia A (2008-2016), Insignia B (2017-2022), Mokka / Mokka X (2012-2020), Zafira B (2005-2014), Zafira Tourer C (2011-2018), Meriva B (2010-2017), Adam (2012-2019), Ampera (2011-2019), Cascada (2013-2019), Viva (2015-2019)
- OEM Numbers: 13502353, 13598760, 1305248
- Material: Plastic
❓ Frequently Asked Questions
Q: Which Vauxhall and Opel models is this cap compatible with?
A: Compatibility covers a long list including Corsa D and E, Astra J and K, Insignia A and B, Mokka/Mokka X, Zafira B and Tourer C, Meriva B, Adam, Ampera, Cascada and Viva. Buyers should check the fitment list against their vehicle year.
Q: How do I confirm it is the correct part for my car?
A: Compare the OEM numbers 13502353, 13598760 or 1305248 and the item photo with the old cap before purchasing; the listing advises checking the OEM number of your old part.
Q: Will fitting this cap stop my car from overheating?
A: User feedback indicates that replacing a faulty expansion cap has effectively reduced overheating incidents, by restoring coolant retention and preventing leaks. Always confirm fitment before installing.
🏆 Our Verdict
Suitable for Vauxhall and Opel owners who need a direct replacement for a leaking or worn expansion tank cap. OEM-number matching and user reports of secure seals are the main selling points, with a simple plastic design supplied as one piece. Cost-effective as a preventive repair, fitting the correct cap can help avoid larger cooling-system failures over time.
