I need a new air box assembly for my 2003 Disco; the entire assembly including the flexible intake pipe to the LH fender/wing.

The 99-02 air box is cheaper and easier to get, is there a big difference between that and the 03-04 air box?

 

03-04 MAF (just the housing is different the sensor itself is the exact same unit), Intake Tube, and Airbox Lid are a different size on the 4.6L vs the 4.0L.

I have known several 03-04 D2 owners that got tired of going thru airbox lids so they switched over to 99-02 MAF Housings, 99-02 Intake Tube, and the Airbox Lid with ZERO performance issues.

 

hmm tempted... and why is the 03-4 lid alwasy breaking and so expensive?

 

Uh, the'99-02s break also. But perhaps not as easily.

 

 

The 4.6 lid from 99-02 Bosch P38 model is the exact same dimensions but much stronger than the D2 lid. Also the entire assembly is cheaper than D2 if you are just after the lid.

 

This post was very timely for me, as I am about to get a used airbox myself, and I now see that it may have been a mistake. Thanks

 

It must be higher quality being on a Range Rover lol, but I've still had to replace some 4.0/4.6L RR airbox lids for the same thing. I think it's a little more common down here due to the extreme heat we get under our bonnets vs other parts of the country.

 

I do believe the late model RR 4.6 lids were made of either a better material or construction.

All the 03/04 Disco lids we get are cracked. I’ve had the RR lids on our 2 04’ D2s for years without issue.

Every 4.6 RR lid I’ve gotten my hands on has been perfect.

 

Kinda the same theory with Bosch RR 4.6L vs Bosch D2 4.6L lol.

I was shocked when I bought my 04 S Vienna Green D2 as it's air box lid was flawless. First 03-04 D2 I've bought used that was actually 100% OEM under the bonnet. She's a looker minus the darn oil light at idle lol.