Depends how close it is to the suspension turret - rules are as follows:
Corrosion
A vehicle can fail with respect to corrosion for:
excessive corrosion in a 'prescribed area' — within 30 cms of certain safety related components, e.g. brakes, steering, suspension, seat belt mountings etc.
excessive corrosion not in a 'prescribed area', but which is likely to adversely affect the vehicle's braking or steering. 'Excessive corrosion' can mean a hole or a significantly weakened structure.
- NB mine had a whole in a similar area and it passed fine.