If / Whether

[MAJSH]

1. Please check with your service department to see if the break booster needs to be changed urgently.
2. Please check with your service department and let us know whether we urgently need to change the break booster.

Would please tell me which one is grammatically correct?

 

[5jj]

1a. Please check with your service department to see if the break booster needs to be changed urgently.
1b. Please check with your service department to see whether the break booster needs to be changed urgently.
2a. Please check with your service department and let us know if we urgently need to change the break booster.
2b. Please check with your service department and let us know whether we urgently need to change the break booster.


All four are grammatically correct,

 

[5jj]

1a. Please check with your service department to see if the break booster needs to be changed urgently.
1b. Please check with your service department to see whether the break booster needs to be changed urgently.
2a. Please check with your service department and let us know if we urgently need to change the break booster.
2b. Please check with your service department and let us know whether we urgently need to change the break booster.


All four are grammatically correct,

So are these:

3a. Please check with your service department to see if the break booster needs to be changed urgently.
3b. Please check with your service department let us know if the break booster needs to be changed urgently.
2a . Please check with your service department and let us know if we urgently need to change the break booster.

In future, when asking which of two alternative sentences is correct, change only the word/structure you are asking about.

 

[Tarheel]

If it was my car I might say, "Do I need to get it fixed now, or is it something that can wait?" (Why the auto mechanics need to have a sense of urgency about it is beyond me.)

 

[Barque]

1. Please check with your service department to see if the break booster needs to be changed urgently.
2. Please check with your service department and let us know whether we urgently need to change the break booster.

Would please tell me which one is grammatically correct?

Do you mean "break" or "brake"? They're pronounced the same but mean very different things.

 

[MAJSH]

Do you mean "break" or "brake"? They're pronounced the same but mean very different things.

Sorry for the typos.
It should have said "brake"

 

[emsr2d2]

Sorry for the typos typo.
It should have said "brake".