My workplace is in a rural location. There are trees on the parking lot. I notice almost everyday either rain or shine that there are a few flying bugs in the car. They are small bugs. How do they get into the car? All windows are up when parked. The only way I can think of is the front grille. Is it possible? Is there any solution to that?
I would think that is unlikely as most in cars I think you will find the bulkhead seals the engine bay from the passenger compartment (even the cables go through rubber grommets)
The more likely route for your critters is probably through the air ventilation system. You could try changing to the recirculatory position before parking. As this is supposed to stop 'polluted' air from geting in (ie fumes from traffic in front) it should in theory stop your insects. In theory the pollen filter should stop them though.
However there must be air vents out of the back of the car (in the normal ventilation mode if fresh air comes in the stale must go out somewhere) and they could possibly be coming in here.
Are they the same type of bugs all the time if so could they have got in on some occasion & nested (or whatever insects do).
Try the ventilation switch option first & let us know how you get on
Check the fit of your pollen filter. You have to remove the black plastic cover between the front wipers to access it. It's somewhat flimsy and might not be sealing properly. Derek
I was thinking about the air vent from the front. Is it the recirculate button you are talking about kelvin? I thought it is only on when the engine is on. During hot summer days I set the fan to blow air front the front. You know the arrow pointing to the seat? In winter I switch it to blow air onto the window.
Are there air vents in the back for air to go out? I never thought of that. I thought when fresh air comes in, they are there to stay. I know there are vents for the two small back wing windows. They are there to clear the fog only?
Yes it was the recirculate button I was thinking of but re reading the on-line owners manual it looks like it is an electrical switch & may well reset when you turn the car off. (usually they are a manual turn switch that physically block off the outside air M/B must do this electrically somehow).
There must be somewhere for the air to get out otherwise the pressure inside would build up to an enormous degree. To get a flow of air you have to have an air inlet & outlet, thats simple physics. Saying that I've just looked all round the back of mine & I could not see any air outlets. Any one any ideas
The vent in the rear must have a flap on it that remains closed unless there is positive pressure in the cabin.
We need detailed pics of all vents on the car. That probably would be very hard for George to pull out of his info on the B. It also would be very nice if some service rep could do the same, and set us straight on how the ventilation system works. I must admit, I've seen a lot of cars apart and I've never seen an exit for ventilation but then again I've never really been looking for it either. I also live in a rural setting which is full of bugs in the spring but they're never ever in the B.
Last edited by Derek Lecours : 09-28-2007 at 06:26 PM.
FWIW, on the Peugeot 405, the vent is in the trunk (boot) flloor on one side, behind a wheel actually (and behind the trunk trim panel); it vents to the underside of the car and has an anti-exhaust fume (and bug!) flap on it (which closes when there is neutral pressure in the car).
I imagine it's in some similarly obscure location in the B.
On some cars I've had the vent is in the rear quarter panels (between the rear door & the rear window) under a fluted plastic trim. The B is appearing to be quite a mystery.
Hi there, as far as i searched in the service manuals i didn't find any specific info for air outlets driving the air out of the car... Only the IN section is described which as all we know is from the front dust filter and is fed into the car from the internal air vents depending on the settings of the controls....
Bugs get into the car from front grille 
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