Coolant Thermostat Housing 55564890 for Vauxhall Opel 1.6 1.8

Name: Coolant Thermostat Housing 55564890 for Vauxhall Opel 1.6 1.8
Brand: ProlineOffice
SKU: 0430ME#SPPLSGBNP26011987c1
Price: 20.63 GBP
Availability: InStock

£20.63

Tax included Shipping calculated at checkout.

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365-Day Money-Back Guarantee

If you are not completely satisfied, you can request a refund within 365 days of receiving your order. We accept returns of unused items in their original condition (including packaging and accessories) as well as products with manufacturing defects.

7-Year Product Warranty

Proline Office offers a 7-year warranty covering defects in materials and workmanship from the date you receive your product. If your product is defective, simply contact our customer service with details and photos, and we will repair or replace it free of charge. If we are unable to resolve the issue, we offer a refund based on usage.

Need Help? Just Ask!

Need help with this product? Our friendly support team is just a message or phone call away. Email us at cs@prolineoffice.co.uk or call us at +441213682209. We'll make sure your purchase is easy and enjoyable every step of the way.

OE Number:

1338402, 1338403, 100460
55559594, 55564890, 55577284
55587350, 5559594, 25192230
55587350, 5559594, 55353311
6338007, 6338044, 6338047
55577073, 71739800, 71744389

Fitment:

For Alfa Romeo 159 939 2007-2011 Estate & Saloon
For Fiat Croma 194 2005-2011 Estate
For Fiat Croma 194 2005-2012 Estate
For Opel Astra GTC J 2011-2018 Hatchback
For Opel Astra J J2009-2015 Hatchback
For OpelAstra J -- 2012-2015 Saloon
For Opel Astra J Sports Tourer J 2010-2015 Estate
For Opel Insignia -- 2008-2015 Hatchback & Saloon
For Opel Insignia Sports Tourer -- 2008-2015 Estate
For Opel Mokka --2012-2015 SUV
For Opel Zafira C C 2011-2015 MPV
For Vauxhall Astra MKV 2004-2010 Hatchback
For Vauxhall Astra MKVI 2009-2015 Hatchback
For Vauxhall Astra GTC MKVI 2011-2015 Hatchback
For Vauxhall Zafira MK Ill 2011-2015 MPV, don't fit Vauxhall Zafira MK Il [2005-2014] MPV

Coolant Thermostat Housing 55564890 for Vauxhall Opel 1.6 1.8 Description

Restore your engine's ideal operating temperature with this premium thermostat housing assembly, complete with integrated sensor, gasket, and clip for hassle-free installation. Compatible with Opel/Vauxhall Astra H/J, Insignia, Zafira, Alfa Romeo 159 (2007-2011), Fiat Croma (2005-2012), and select models—verify your OE number (e.g., 55564890, 1338402). The high-quality wax element ensures accurate opening at precise temperatures, preventing overheating, poor heater performance, or erratic temps. Built with durable stainless steel body and corrosion-resistant seals for long-term reliability in extreme conditions. Direct OEM replacement—no modifications required. Backed by 7-year warranty and 365-day money-back guarantee for peace of mind.

Coolant Thermostat Housing 55564890 for Vauxhall Opel 1.6 1.8 FAQs

What vehicles is this thermostat housing compatible with?

This thermostat housing (OE equivalents: 55564890, 1338402, 55559594, etc.) is compatible with a wide range including Opel/Vauxhall Astra J/H/GTC (2009-2018), Insignia (2008-2015), Zafira (select years), Alfa Romeo 159 Saloon/Estate (2007-2011), and Fiat Croma Estate (2005-2012). Always cross-check your vehicle's OE number and engine code (e.g., A16XER, Z18XER) for exact fitment. It is a direct plug-and-play replacement—no modifications needed. Professional installation is recommended to ensure proper alignment and avoid leaks. Compatibility is not guaranteed for all variants; consult your service manual or mechanic to confirm before purchase.

What problems does a failing thermostat housing solve, and what are the benefits?

A faulty thermostat housing can cause engine overheating, slow warm-up, no cabin heat, erratic temperature gauge readings, reduced fuel economy, increased emissions, and accelerated engine wear. This replacement restores precise temperature regulation via its high-quality wax pellet, optimizing coolant flow for peak performance. Benefits include improved fuel efficiency, lower emissions, smoother operation, and extended engine life. The integrated sensor provides accurate monitoring. Made with stainless steel and corrosion-resistant components, it offers superior reliability over worn originals. Easy OEM-style installation minimizes downtime and restores factory performance—ideal for addressing common cooling system issues proactively.

How durable and reliable is this thermostat housing?

Engineered for exceptional durability, this thermostat housing features a robust stainless steel main body and valve, paired with high-grade corrosion-resistant rubber seals that withstand extreme temperatures, chemicals, and environmental stress. It resists cracking, leaking, and degradation common in aged plastic housings. The precise wax element maintains consistent operation over time, reducing failure risks. Built to meet or exceed OEM standards, it delivers long-lasting performance in demanding conditions. Backed by a 7-year limited warranty against manufacturing defects and a 365-day satisfaction guarantee, it provides confidence in reliability. Regular coolant maintenance further enhances longevity—avoid mixing coolant types to prevent issues.

When should I replace the thermostat housing, and what are installation considerations?

Replace if you notice overheating, fluctuating temps, coolant leaks from the housing, poor heater output, or diagnostic codes like P0128. Common at 80,000-150,000 miles or 8-10 years due to wear, corrosion, or wax element fatigue. This direct-fit unit includes gasket, clip, and sensor for straightforward replacement—drain coolant, remove old housing bolts, install new one, refill, and bleed system. No modifications required, but professional installation is advised to ensure proper torque, hose connections, and air-free system (prevents air locks/overheating). Always work on a cool engine to avoid burns. Not responsible for misuse, improper install, or unrelated cooling issues.