I am a newbie on this forum and my knowledge of Z22SE and Z22YH engines is minimal. I am an American living in Sweden for a year and I purchased a used 2006 Opel Zafira B (which I think is nearly identical to a 2006 Vauxhall Zafira B) with a Z22YH engine and 6spd MT as transportation in Sweden. My problem is that is I cracked the oil sump tray (oil pan in American lingo) on the bumpy dirt access road to Tresticklan National Park (well worth visiting if you ever travel to southern Sweden). I am looking for the least expensive sound used part as a replacement and the information I have found regarding this part on the web is confusing. (A very kind mechanic at the VW/Audi/Skoda dealer in Lysekil opened his shop after closing on Friday and repaired the crack with epoxy.)
My understanding is that the Zafira 2.2SE and 2.2YH engines are GM Ecotec engines akin the 2.2L Ecotec engines in GM cars manufactured in the US. I know nothing about GM 2.2 Ecotec engines except they have been widely used in Opels and Vauxhalls. (My first car was a 1971 Chevrolet Vega and I have not considered buying a GM vehicle in the US since that experience.) But the oil sump trays for the Z22SE and Z22YH engines look identical in all of the pictures I have seen. There evidently is a distinction between pans designed for cars equipped with a multi-function display and those that are not. I think the multi-function trays have a tap for a sensor that measures oil level. My car has a multi-function display but the computer function on my display (selected using the "BC" button below the display screen) shows "NO FUNCTION", so my car either never had oil level sensing or it was disabled at some point during the car's history (I am the fourth owner). There are several different part numbering schemes used to identify Z22 engine parts in Europe. The current GM part numbers for my car are 55557090 and 55557091 and the latter number (based on what I have inferred from reading part listings on the web) refers to the part supporting oil-level reporting in the multi-function display. Opel (and perhaps Vauxhall) appears to use a different part numbering scheme.
I cannot detect any visual difference in the oil sump trays between the Z22SE engine used in Zafira-A (and other older Opel/Vauxhall) models and those used in Zafira-B models but GM lists different part numbers 90537756 and 90537578 for the older (Zafira-A) engine. I presume that one of these numbers refers to a tray supporting oil-level reporting and the other does not but I have not seen any web pages that directly address this issue. My question is the following: if I am not concerned about oil-level reporting (given my BC display has no function), is any Z22SE/Z22YH oil tray compatible with my vehicle? In the pictures I have seen, they all look identical (except for a tap for an oil-level sensor) independent of model year and specific model (Zafira/Astra/Vectra). Moreover, some of the older Z22SE (Zafira A) pans support oil level reporting. My primary reason for asking is that the prices on sump trays identified as 55557090 and 55557091 are significantly higher than for oil sump trays for older Z22SE engines. My impression is that newer Z22SE engines list the same sump tray part numbers as my Z22YH engine so if there is a difference in trays for Z22 engines, it apparently applies to Z22SE engines (older engines require a different part than new ones). The following page seems indicate a change in pan design for Z22SE engines
http://www.ebay.co.uk/itm/Vauxhall-Astra-G-Zafira-Vectra-B-VX220-2-2-Z22SE-Oil-Sump-24406359-sensor-/251262365580
It includes an "up to chassis number" qualification but does not specify any GM part numbers that I recognize except 12576650, which is listed on other pages as a synonym for 5555709 (the number for the 2006 Zafira Z22YH engine without multi-function display support)! See http://www.bildelsbasen.se/?link=item&post_id=21653918. The car shown on this page is nearly identical to mine but has an automatic transmission. Given this sort of conflicting information on the web, I clearly some expert advice.