Is it dangerous to drive with a leaking housing?

Not immediately, but ongoing coolant loss risks overheating — repair promptly and monitor coolant level in the meantime.

Should the thermostat be replaced when replacing the housing?

It’s common practice to replace both together, since the housing needs to be opened for access anyway, and it avoids doing the job twice soon after.

What is the housing made of?

Aluminium or heat-resistant plastic, depending on the engine.

What is this part and what does it do?

Full description available in the product description section above. Contact us with clarifying questions.

How do I tell if my part is faulty?

See the 'Signs of a faulty part' section above or run a diagnostic at an auto service.

Yes - all our used parts are tested before sale and sold with guaranteed quality.

When should the part be replaced?

When warning signals appear, diagnostic codes are present, or the system malfunctions.

Thermostat housing OPEL ASTRA SPORT 2017

Name: Thermostat housing OPEL ASTRA SPORT 2017
Brand: OPEL
SKU: 55496778
Price: 54.00 EUR
Availability: OutOfStock

OEM: 55496778

Disassembled car photo

Engine running

Tested before shipping
Guaranteed quality
Fast delivery 3–7 days
14-day returns

What is this part and why does it matter?

The thermostat housing holds the thermostat in place and connects the coolant circuit between the engine and radiator.

Ask a question

Not sure about compatibility? Send us a question with your car's make, model and year.

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Signs of a faulty part

If you notice any of the following, the part likely needs replacement:

Coolant leak at the housing seams
Overheating or slow warm-up from a stuck thermostat combined with a leaking housing
Cracks visible on inspection

Installation information

Requires draining the coolant before removal — always fit a new gasket or O-ring when reinstalling.

Donor vehicle description

VIN: W0LBD8EG2H8095335
Make, model: OPEL ASTRA SPORT
Year: 2017 (A)
Engine: Diesel 1.6L 100KW B16DTH LVL
Transmission: 6-speed Mechanic - MZ4
Drive: Front
Equipment: LHD
Colour: GAZ (40R)

196 parts from this car

Frequently asked questions

Most often from age and heat cycling making plastic housings brittle, or from over-tightening bolts during a previous thermostat replacement.

What our customers say

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Price: affordable. Service: electrical equipment repair.
A
Andris B.
September 2026
Price: excellent.
D
Didier V.
August 2026
Super good! They came through with the part I needed, quickly and at a fair price! Thanks, and I definitely recommend!
I
Ilmars K.
August 2026
I ordered a Heater Blower Motor Resistor for a Toyota Avensis. Delivery took eight days from Latvia to Ireland. I installed it, and everything works perfectly. I wish this company success.
A
Aleksandr L.
Toyota Avensis
August 2026
No complaints about Evro Trans itself, everything's fine. But the delivery..... It felt like the order was being carried by turtles. 4 days from Riga to Daugavpils. Judging by the tracking, the parcel just sat somewhere behind a shed for 3 days, then they found it and delivered it the next day. I think that's why I won't be ordering there again.
P
Paul F.
June 2026
Super fast delivery of the part, and good quality of the used part. Thanks for the service.
N
Natālija I.
May 2026
I ordered antifreeze heaters and an auxiliary pump. Everything arrived quickly, the very next day, and matched the description. I'm satisfied.
J
Juris J.
February 2026
Excellent service, timely delivery, and complete transparency at every step. I highly recommend EvroTrans to anyone looking for a reliable partner!
E
Egor S.
November 2025
Bought a front fender for my car. I liked it! After payment they sent more than 20 photos of the problem areas, and it was packed very securely - took a while to unwrap.
I
Igors K.
Front fender
October 2025