The recommended power steering fluid for the 2004 Infiniti G35 is automatic transmission fluid (ATF) that meets the Dexron III specification. In practice, ATF labeled Dexron III or Dexron III/Mercon-compatible is commonly used and considered acceptable by most service guides.
This article explains the official spec, how to identify an appropriate fluid, and practical steps for checking and replacing the fluid to keep the steering system operating smoothly.
Fluid specifications and why they matter
The G35’s power steering system relies on ATF rather than a dedicated hydraulic steering fluid. The standard specification calls for ATF that meets Dexron III standards. Using a non-ATF steering fluid or one that isn’t Dexron III-compatible can lead to worn seals, reduced steering assist, and other performance issues. When shopping, look for labels that say Dexron III or Dexron III/Mercon compatibility.
It’s common to find ATFs described as Dexron III or Dexron III/Mercon on the bottle. Both are generally acceptable for this application as long as the product explicitly carries the Dexron III compatibility. When in doubt, consult the owner’s manual or contact a Infiniti/Nissan dealer for confirmation.
What fluids to use
Below are the key points to guide your purchasing decisions. This helps ensure you don’t accidentally use a non-ATF hydraulic fluid or a fluid that isn’t Dexron III-compatible.
- ATF labeled Dexron III or Dexron III/Mercon compatibility
- Any reputable brand that explicitly lists Dexron III compatibility on the bottle
- Only use ATF formulated for automotive use in power steering systems; avoid non-ATF hydraulic fluids
By sticking to Dexron III-compatible ATF, you help preserve seals and maintain proper steering assist. If you’re unsure about a product, check the label or ask a qualified technician.
How to check and replace power steering fluid
Before performing maintenance, ensure you have the correct ATF and the engine is ready. The following steps outline a typical top-up or replacement process for the 2004 G35.
- Park on level ground and warm up the engine slightly (warm fluid helps it circulate). Turn off the engine before opening any reservoirs.
- Open the power steering fluid reservoir cap and inspect the fluid. It should be pink or amber-colored and translucent. If it’s dark, burnt-smelling, or contaminated, a fluid change is advisable.
- Check the fluid level using the dipstick or marks on the reservoir. If the level is below the recommended range, add Dexron III ATF slowly until it reaches the proper level. Do not overfill.
- For a full replacement or periodic flushing, you may need a dedicated power steering flush. This procedure varies by vehicle and may require a recovery container and additional steps; consult the service manual or a professional if you’re not confident performing a flush.
- With the engine running and the steering wheel turned from lock to lock several times, check again for the correct level and look for air bubbles or foaming, which can indicate trapped air. Refill as needed to the correct mark.
- Reinstall the reservoir cap securely and check for leaks around hoses and the pump. If you notice leaks or whining noises from the pump, address them promptly, as they can indicate low fluid or pump wear.
These steps provide a general guideline. Always refer to the user manual for model-specific instructions, cautions, and capacity specs for the 2004 Infiniti G35.
Common issues and maintenance tips
Keeping the fluid at the proper level and using the correct specification helps prevent common problems such as steering effort changes, whining from the power steering pump, or erratic steering feel. If you notice unusual noises, difficulty turning the wheel, or fluid leaks, have the system inspected by a technician to determine whether it’s a fluid issue, a pump problem, or a seal leak.
Summary
For a 2004 Infiniti G35, use ATF that meets the Dexron III specification (Dexron III or Dexron III/Mercon-compatible). This ensures proper lubrication and sealing of the power steering system. When in doubt, confirm with the owner’s manual or a qualified Infiniti/Nissan technician, and follow careful steps when checking or replacing the fluid to maintain optimal steering performance.