EGR Question

i don't see any reason to change it, but you might consider cleaning the egr circuit

 

There are a few checks that might be simple enough to undertake without a garage.

1. Ask the car for its current EGR flow measurement. This requires nothing more than plugging a scan tool in from the driver's seat. Not even any dirt under the fingernails.

2. Check and clean the EGR passages in the intake manifold. This is probably around twenty minutes' work if you've done it before, probably an hour or so if you haven't. Requires a bit of mechanical skill and confidence, but not virtuosic amounts. If you pay attention to tips that the throttle body coolant hoses are long enough to set it out of the way without draining any coolant, you don't need to fuss with draining or refilling any coolant.

3. Check the rotor in the EGR valve for mashed ski-jump syndrome. There are only two Phillips screws involved in this check, but they can be stubborn. The kind of non-power impact driver that you hold with one hand and bop on the end with a hammer will usually startle them loose in two or three bops.

The overall flow measurement you ask for in (1) does not tell you about those manifold passages, so it is always good to do (2) at some reasonable mileage (kilometerage?) anyway.

The mashed ski-jump (3) probably does affect the overall flow measurement, so if the measurement in (1) looks very good, it's probably safe to skip checking (3).