Renix 4.0 Volvo injectors & California Smog

[BlackMJ90]

Hi there,

 

I need to replace some of the freeze plugs on the driver side of my MJ and I will have the manifolds and injector rail off and so I am revisiting installing the Bosch injectors from a Volvo. I know that’s been covered a TON on here, but what I can’t seem to find a definitive answer on is whether installing these injectors would interfere with CA smog testing in any way. I really don’t want to spend the money on the upgrade only for it to fail the next t smog test it needs. This is the whole reason I have not yet just done the upgrade. 
 

any advise is welcome!

[fiatslug87]

I run the volvo injectors in all three of mine, no problems with smog testing in CA.

 

My ‘88 with the volvo injectors and a new cat.

[BlackMJ90]

On 1/19/2026 at 7:07 PM, fiatslug87 said:

I run the volvo injectors in all three of mine, no problems with smog testing in CA.

 

My ‘88 with the volvo injectors and a new cat.

That’s great! That gives me comfort for sure.