How to access the O2 sensors please?

[belfry]

2006 DB9 Volante.

I have had a recurring Emission Service Due warning over the last 2 months, and I decided to do something about it, rather than just erasing the code.

It appears to be Bank 1 Sensor 1 from the fault code. I have bought both front and rear sensors and I thought that I would ask for advice from anyone who has changed them DIY.

I have looked from above and below and sensor 1 seems very hard to reach. Is there a way to get a spanner to it? Maybe I will have to remove the wheel and wheel liner?

Any advice gratefully received!

[belfry]

Oddly, since I bought the 2 O2 sensors the Emissions warning has not come on!

I am sure that this issue will come back again and I would still like to know how to access the O2 sensors to change them.