Hi David and Chetan, thank you for your replies
@David: There is no individual page for car. I have created a page and changed its url as a wildcard url to show car's data. CMS can still return that page even the car id in url is incorrect. So, 404 header will not be sent since no car found.
@Chetan: I think about this way before but I don't think it is best choice for some reasons:
- It take 2 time to redirect to 404 page
- It could be confused because sometime it just renders 404 page without change the url, sometime it redirects to the 404 page. Client will not be happy about that.