Originally Posted by PickleRick

You can buy a cheaper oem vw maf assembly (same bosch sensor as rover) and reuse your rover housing.

Coils can be done in about an hour. I've had good luck with 70 dollar Amazon ones ymmv.

I had no issues with bosch o2 sensors other than a leaky head gasket and valve cover killed one quickly. An ebay seller had these for sub 50 bucks each out of Miami.

The fuel mileage you save makes it worth while to replace dead o2 sensos. At least on a daily driver.