[Filters & Oil] Hdi Blue 120 Air Filter woes

[Lightspeed]

Help!

We're heading off on holiday in the XTR at the end of the week,  so I thought it'd be a good idea to change oil and filters.

We've owned the car since last October and this is the first work I've undertaken on her.

Engine oil and filter changed very easily. The air filter less so... in fact I've given up and need advice.

On our 2016 Blue 120 Hdi the Turbo modulator and MAF electrical connector have to be be disconnected from the air box lid.

The MAF connector has an orange slider/ lock.  I've slid the orange lock back but the connector refuses to budge.  IS THERE A TRICK TO OPENING THESE?

Worse,  the turbo modulator press on connector ( black  with press tabs left and right) literally fell off in my hands,  revealing a short stub of outlet tube from the air box with the remainder of the outlet sheered off in the connector. It looks to me to have been super-glued in place!

Modulator tube now  re-attached using a small 5mm dia stint between the ends of the sheered tube.  A new air filter box is now on order from Citroen, with a chance of it being delivered to the local garage  this Thursday.  Fingers crossed.

So,  can someone tell me how the electrical connector should be undone?  Hopefully that's not been super-glued in place too! 

[Sol]

The orange tab may swing up and a flat blade needed to gently pry the plug out of the socket. The plugs on these can be very tight. Can you post a pic of both the MAF plug and the thing you're calling the turbo modulator pipe?

Normally the plugs have a squeeze tab you must push down at the same time as pulling apart. I need to see your plug to be sure in case it's different on the 2016 model.

[Lightspeed]

The orange tab may swing up and a flat blade needed to gently pry the plug out of the socket. The plugs on these can be very tight. Can you post a pic of both the MAF plug and the thing you're calling the turbo modulator pipe?

Normally the plugs have a squeeze tab you must push down at the same time as pulling apart. I need to see your plug to be sure in case it's different on the 2016 model.

Hi zion.

Pic attached.

A= what I thought was Turbo modulation line..... Car ran fine with this disconnected and didn't throw any warning lights

B= The Maf connector

[Lightspeed]

The orange tab may swing up and a flat blade needed to gently pry the plug out of the socket. The plugs on these can be very tight. Can you post a pic of both the MAF plug and the thing you're calling the turbo modulator pipe?

Normally the plugs have a squeeze tab you must push down at the same time as pulling apart. I need to see your plug to be sure in case it's different on the 2016 model.

[Sol]

Ok, you don't (didn't) need to touch either of those things to do the air filter mate, only 3 torx screws and 2 clips - you need to tweak the clips off with a flat blade driver and removing the fluid reservoir makes it easier (don't disconnect the pipe, just unbolt the tank and move to the side)

See this video for how to do the filter in the easiest way:

https://youtu.be/h_VEJM4LOSA

[Lightspeed]

No, the air filter box is different to the one your link. The Maf and vacuum connectors are connected through the lid of the filter box.

When I get the new filter box from Citroen, I'll post a pic.

[Sol]

Ok buddy. That's odd, I'd have thought they kept them attached to the body of the filter housing as usual.

[Lightspeed]

Ok buddy. That's odd, I'd have thought they kept them attached to the body of the filter housing as usual.

Exactly Zion,  this way round creates unnecessary complexity and risk of breakage... as I discovered!

[Sol]

I may be wrong, but I think that pipe is the MAP sensor connection. Though I would expect it to be downwind of the turbo if it was. Maybe there is a seperate MAP and boost sensor. I've never had to check this and my current van is my first B9, had more experience (read issues) messing with the previous M59's.

I only knew about the filter lid as mine was left unclipped when I got the B9 and rattled like buggery, so I had to secure it.

[Lightspeed]

I may be wrong, but I think that pipe is the MAP sensor connection. Though I would expect it to be downwind of the turbo if it was. Maybe there is a seperate MAP and boost sensor. I've never had to check this and my current van is my first B9, had more experience (read issues) messing with the previous M59's.

I only knew about the filter lid as mine was left unclipped when I got the B9 and rattled like buggery, so I had to secure it.

My other car's a TD5 Land rover,  so I'm making some assumptions about the purpose of these connections.  

When the new air box arrives,  I'll ask the mechanic to confirm the role of each of the connections and will let you know.

Plan is to keep the old air filter housing and repair the damage with more robust hardware,  and keep it on the shelf in case I or anybody else needs one in future. ( Dealership said this breakage is quite common)