- Messages
- 1,699
- Location
- Brentwood, Essex
If the whistling only occurs at +70mph it's wind noise caused by a gap / hole somewhere. It could be something as small as a burst air-bubble in the paint work somewhere, or more likely around the door mirror / A –pillar (the bit between the windscreen and the door.) The only way to find the source is trial and error using duct tape. It's not a safety issue.