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Opel Corsa 1.0 b Engine Oil Leak: Diagnosing and Fixing Temperature Sensor Issue

camelot7777 16776 17
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Why is oil leaking from the sensor on the top-left side of my Opel Corsa B 1.0 engine, and how do I fix it?

It is the oil pressure sensor, not the temperature sensor, and the usual fix is to replace the whole sensor rather than trying to reseal it [#16921014] On the X10XE 1.0 Ecotec engine it sits on the left side of the engine near the timing cover, and the replacement usually comes with the required gaskets [#16921014] The part is cheap, around 10–20 PLN, so several replies recommend fitting a new one instead of changing only seals [#16921014] The swap is simple: disconnect the wire and unscrew the sensor with a suitable wrench [#17445743] If possible, buy the updated OEM/ASO version, because cheap equivalents may start leaking again after a while [#17445805][#17447553]
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  • #1 16920017
    camelot7777
    Level 6  
    Posts: 7
    Rate: 3
    Board Language: polish
    Hello. I with the problem of leaking engine oil in the Opel Corsa b 1.0 from the sensor, I'm not mistaken, the temperature. Namely, in the engine on the top left there is a sensor, I guess it is from the temperature, I get oil from it, when I start the car it leaks under pressure until it wraps the radiator and stripes. I saw when I pulled out the sensor that there is a rubber gasket in it but that it does not meet the seal, from under the copper washer it does not leak just with this sensor. What is the reason and how to fix it?
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  • #2 16920042
    dywanelektronik
    Level 20  
    Posts: 522
    Help: 36
    Rate: 46
    Board Language: polish
    Provide some photos of the place and this sensor, we can do something about it.
  • #3 16920087
    camelot7777
    Level 6  
    Posts: 7
    Rate: 3
    Board Language: polish
    This is the oil pressure sensor from what I found out and I am after opening the bonnet on the left side of the engine in front of the radiator, of course in my Opel Corsa 1.0, because it may be in other engines in other engines. When I leave work I will take a picture and send it.
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  • #4 16920222
    autoas
    Level 42  
    Posts: 9188
    Help: 571
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    Board Language: polish
    And it did not occur to you to replace it with a new one ....
  • #5 16920246
    rob4028
    Level 25  
    Posts: 621
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    Board Language: polish
    autoas wrote:
    And it did not occur to you to replace it with a new one ....

    change of oil pressure sensor manufacturer (because it leaked) :D :D :D :D
  • #6 16921014
    LENIWIEC_PL
    Level 28  
    Posts: 1467
    Help: 119
    Rate: 319
    Board Language: polish
    If the author of the topic has a Corsa B with an X10XE (1.0 Ecotec) engine, he means a reliable oil pressure sensor. It is mounted on the left side of the engine next to the timing cover or on its housing (I do not remember exactly). I suggest not playing in the exchange of seals but replace the entire sensor because it costs only 10-20 PLN and therefore inexpensive. Gaskets should be included with the sensor.
  • #7 16922233
    camelot7777
    Level 6  
    Posts: 7
    Rate: 3
    Board Language: polish
    Hello. Yes, gentlemen, it is exactly about this sensor about which I write leniwiec_pl. Opel Corsa 1.0 b Engine Oil Leak: Diagnosing and Fixing Temperature Sensor Issue
    This sensor is not uniform, I do not leak oil from under this copper washer at the engine but it leaks even though there is a gasket at the very beginning of the sensor. I know that this is not a big cost of the sensor and it should be replaced only if any of you know about any replacement and better sensor.
  • #8 16922273
    zybex
    Helpful for users  
    Posts: 15888
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    Board Language: polish
    Sensors are very cheap. Someone once told me to replace it every year, especially when we buy a cheaper equivalent.
    In Corsa C I've changed it probably three times in the last few years.
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  • #9 17445717
    Bulas71
    Level 2  
    Posts: 4
    Rate: 2
    Board Language: polish
    Hello. I have to play miner. I am away and I have a problem with this sensor - it drips oil. I don't know if it can be bought and replaced right away? I have made up for the oil loss, but I have to go home 600km. Can you wrap it in a plastic bag and wrap it with fear? Thanks for all suggestions ... Auto is Astra h 1.4 petrol.
  • #10 17445743
    zybex
    Helpful for users  
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    Bulas71 wrote:
    I don't know if it can be bought and replaced immediately.

    I have already bought it three times in the same small automotive shop. The exchange is simple. All you need is a suitable spanner. First you need to disconnect the cable.
  • #11 17445754
    Bulas71
    Level 2  
    Posts: 4
    Rate: 2
    Board Language: polish
    Is it important to have it dedicated or are they universal?
  • #12 17445805
    MikeC
    Level 32  
    Posts: 1391
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    Buy once in the ASO with new numbers (is corrected) and the topic will not come back ...
  • #13 17446760
    Bulas71
    Level 2  
    Posts: 4
    Rate: 2
    Board Language: polish
    Heck, I look at the dealership, the price is over PLN 135 ... edit - I called the Dealership in Krakow and it is like oil pressure and PLN 48. How to check if it is an improved sensor?
  • #14 17447545
    zybex
    Helpful for users  
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    The one to Corsa that I bought cost very little. The fact that the salesperson said it was some kind of equivalent and is therefore cheap. He said that it is even worthwhile to change it once a year for the price. Just look at the well-known auction site (for orientation) by entering "Corsa oil pressure sensor" (in my case).
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  • #15 17447553
    Alfred_92
    Level 33  
    Posts: 2971
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    Board Language: polish
    If you don't buy it, it will last a year or two (it leaks from a pin inside).
  • #16 17447971
    Bulas71
    Level 2  
    Posts: 4
    Rate: 2
    Board Language: polish
    I bought at ASO for almost 5 smokes ... I hope it will last a long time. I have been driving the Asterka for over 5 years and I exchange it for the first time. Thanks for your help.
  • #17 20512907
    deadpoolredsuit
    Level 2  
    Posts: 2
    Rate: 1
    Hi,

    Oil dripping from what I believe is the coolant temperature sensor (front of the engine - top left)

    My Corsa details: I believe it is a CORSA-C Hatchback
    Date of registration: 2005
    Variant: AG11
    D.3 Model: CORSA LIFE TWINPORT
    D.5 Body Type: 3 DOOR HATCHBACK
    PETROL
    998 CC

    Looking on eBay, are there variations / models of sensor? ..or did VAUXHALL stick to one type for CORSA's?

    Here is a photo. The sensors I have seen on eBay appear to look shorter.
    The sensor on my CORSA looks longer, could be incorrect part on car?
    The wire situation looks knackered.
    Attachments:
    • Opel Corsa 1.0 b Engine Oil Leak: Diagnosing and Fixing Temperature Sensor Issue CORSA-C Oil Leak.jpg (934.99 KB) You must be logged in to download this attachment.
  • #18 20513529
    thomas48
    Level 21  
    Posts: 359
    Help: 44
    Rate: 80
    Board Language: polish
    Did you read the whole thread? This is oil pressure sensor!!! Buy a new one and problem solved. Any auto shop will find the right one.
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Topic summary

✨ The discussion revolves around an oil leak issue in the Opel Corsa B 1.0, specifically from the oil pressure sensor located on the left side of the engine. Users suggest that the sensor should be replaced rather than attempting to fix the gasket, as the cost of a new sensor is relatively low (10-20 PLN). The original poster confirms the leak is from the sensor despite having a gasket. Recommendations include purchasing a new sensor, with advice to consider quality and potential yearly replacements for cheaper equivalents. There is also mention of the Corsa C model and a user discussing a coolant temperature sensor, indicating some confusion about the specific sensor type. Overall, the consensus is to replace the faulty sensor to resolve the oil leak issue.
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FAQ

TL;DR: On Opel/Vauxhall 1.0 (X10XE) engines, the oil pressure sensor often leaks; most fixes cost 10–20 PLN. “Replace the entire sensor.” [Elektroda, LENIWIEC_PL, post #16921014]

Why it matters: This FAQ helps Corsa owners quickly identify an oil leak that looks like a temp‑sensor issue and fix it cheaply and safely.

Quick Facts

Is my leak from the coolant temperature sensor or the oil pressure sensor?

It’s the oil pressure sensor. A forum expert clarified, “This is oil pressure sensor!!! Buy a new one and problem solved.” Misidentifying it as the temp sensor is common because it sits high and left at the front. [Elektroda, thomas48, post #20513529]

Where exactly is the oil pressure sensor on the Corsa B 1.0 (X10XE)?

On the left side of the engine, near or on the timing cover. Owners describe it as easy to spot from above, front‑left of the bay. “Replace the entire sensor” rather than chasing seals. [Elektroda, LENIWIEC_PL, post #16921014]

Can I just replace the gasket or O‑ring instead of the whole sensor?

Skip gasket swaps. The leak often comes through the sensor body, not the copper washer. The practical advice is to replace the whole sensor; it’s inexpensive and includes gaskets. [Elektroda, LENIWIEC_PL, post #16921014]

Can I drive a long distance with a leaking sensor, or should I fix it now?

Fix it now. Members advise buying the part locally and swapping it immediately. The job is simple with a spanner; disconnect the cable first. Delaying risks rapid oil loss under pressure. [Elektroda, zybex, post #17445743]

Are these oil pressure sensors universal, or do I need a specific part?

They’re application‑specific, but any competent parts store can match the correct sensor for your Corsa by model and year. “Any auto shop will find the right one.” [Elektroda, thomas48, post #20513529]

Should I choose OEM (dealer) or a cheap aftermarket sensor?

OEM is the durability pick. “Buy once in the ASO with new numbers (is corrected) and the topic will not come back.” Aftermarket pieces work but may fail sooner. [Elektroda, MikeC, post #17445805]

How much should I expect to pay at the dealer?

One owner was quoted around 48 PLN for the oil pressure sensor at a Krakow dealership. Prices vary by region and brand, but this is a real‑world example. [Elektroda, Bulas71, post #17446760]

Why does oil leak through the sensor even when the copper washer looks fine?

A common failure is internal: it “leaks from a pin inside.” That’s why a new washer won’t cure it. Replace the sensor body to stop the seep. [Elektroda, Alfred_92, post #17447553]

How often do these sensors fail on Corsas?

Failures are not rare with budget parts. One user replaced the sensor three times over a few years; others suggest yearly swaps for cheap equivalents. That’s your reliability baseline. [Elektroda, zybex, post #16922273]

Quick how‑to: How do I replace the oil pressure sensor roadside?

  1. Disconnect the electrical cable from the sensor.
  2. Use the correct spanner to unscrew the old sensor.
  3. Screw in the new sensor with its included gasket, then reconnect the cable. “Exchange is simple.” [Elektroda, zybex, post #17445743]

My leak isn’t from the copper washer; oil sprays around the bay. What does that mean?

That pattern points to failure through the sensor body itself. Owners report oil escaping from the sensor and wrapping the radiator with stripes. Replace the entire unit. [Elektroda, camelot7777, post #16922233]

Does the same issue affect Corsa C as well?

Yes. A Corsa C owner reported changing the oil pressure sensor multiple times over the years. Expect similar symptoms and an easy, low‑cost fix. [Elektroda, zybex, post #16922273]

What about Astra H 1.4—same problem and fix?

An Astra H owner reported oil dripping from the sensor and resolved it by buying a new sensor at the dealer. Replacement is straightforward with basic tools. [Elektroda, Bulas71, post #17447971]

Can I wrap the leaking sensor in plastic as a temporary fix?

Members steered away from hacks. Instead, buy a correct sensor and replace it immediately; it’s a quick job with a spanner. “The exchange is simple.” [Elektroda, zybex, post #17445743]

Any tell‑tale sign I picked the wrong sensor from eBay?

If your installed sensor looks unusually long or different from listings, assume a mismatch. Have a local shop cross‑reference by VIN and engine code to ensure fit. “Any auto shop will find the right one.” [Elektroda, thomas48, post #20513529]
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