Service Information: Overview

Introduction

Due to its harmful effect on the ozone layer, R-12 is being phased out and replaced by R-134a, which does not harm the ozone layer. While the R-134a A/C system is very similar to an R-12 A/C system, the differences in the refrigerant, lubricants, and service equipment are important.

Nissan A/C systems will change from R-12 to R-134a at the time of new vehicle (full model change) introduction, or in some cases by model year update to an existing model line.

This bulletin describes all of the general differences between the R-12 and R-134a systems. For details of an R-134a system for a specific model, refer to that model's service manual or new product information.