🔧 Altima - CVT Fluid Drain & Refill

Your Altima uses a CVT (continuously variable transmission), and fresh CVT fluid helps protect the belt and pulleys from wear. On this model, the safest DIY approach is a simple drain-and-refill (not a power “flush”), then verify the fluid level correctly.

Difficulty Level: Intermediate | Estimated Time: 1.5-3.0 hours

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⚠️ Safety & Precautions

• ⚠️ Work on a level surface and support the car with jack stands before going underneath.
• ⚠️ CVT fluid level is temperature-sensitive; an incorrect level can cause slipping or damage.
• ⚠️ Exhaust and transmission parts can be hot—let the car cool, then warm it only as instructed.
• ⚠️ Keep dirt out of the fill opening; even small debris can harm a CVT.
• ⚠️ Battery disconnect is not required for this service.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 2-ton minimum)
• Jack stands (rated 2-ton minimum)
• Wheel chocks
• Safety glasses
• Nitrile gloves
• Trim clip remover
• Phillips screwdriver
• 10mm socket
• 3/8" drive ratchet
• Torque wrench (10–80 Nm range)
• Drain pan (10-quart minimum)
• Funnel with long hose
• Measuring container (quart/liter marked)
• OBD2 scan tool with live data (specialty)
• Shop rags

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Nissan CVT Fluid NS-3 - Qty: 5 quarts
• CVT drain plug crush washer - Qty: 1
• Brake cleaner - Qty: 1

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📋 Before You Begin

• Park your Altima on level ground, set the parking brake, and chock the rear wheels.
• Lift the front with a floor jack and support with jack stands at the factory lift points.
• Locate your CVT fill point at the top of the transmission (accessed from the engine bay). Clean the area with shop rags so no dirt falls in.
• If you have an OBD2 scan tool with live data (specialty), set it up to read CVT fluid temperature (sometimes shown as “CVT Fluid Temp” or “TFT”).

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the lower splash shield (if equipped)

• Use a trim clip remover and Phillips screwdriver to remove plastic clips/screws.
• Use a 10mm socket and 3/8" drive ratchet for any 10mm bolts, then set the shield aside.

Step 2: Drain the CVT fluid

• Place a drain pan (10-quart minimum) under the CVT drain plug.
• Use the correct socket with a 3/8" drive ratchet to remove the drain plug and let it fully drain.
• Tip: Let it drip 5–10 minutes.

Step 3: Measure what came out

• Pour the drained fluid into a measuring container (quart/liter marked) to record the amount.
• This is your starting refill amount (a typical drain-and-refill is often around 4 quarts, but measure yours).

Step 4: Reinstall the drain plug with a new washer

• Clean the drain plug area with shop rags and brake cleaner.
• Install a new CVT drain plug crush washer on the plug.
• Thread the plug in by hand first (to avoid cross-threading), then tighten with a torque wrench. A torque wrench is a tool that tightens bolts to a precise setting so you don’t strip threads or leave it loose.
• Torque to 34 Nm (25 ft-lbs)

Step 5: Refill with Nissan NS-3 CVT fluid

• From the engine bay, open the CVT fill point (often a locking cap near the transmission). Clean around it first with shop rags.
• Insert a funnel with long hose.
• Pour in the same amount you measured using Nissan CVT Fluid NS-3.
• Tip: Pour slowly to prevent burping/overflow.

Step 6: Circulate fluid and bring it to checking temperature

• Start the engine and keep your foot on the brake.
• Move the shifter slowly through P-R-N-D-L, pausing 2–3 seconds in each position, then return to P.
• Use an OBD2 scan tool with live data (specialty) to monitor CVT fluid temperature.

Step 7: Verify the CVT fluid level (most accurate method)

• With the engine idling and the car level on jack stands, verify level at approximately 35–45°C (95–113°F) using the procedure your Altima is equipped with:
• Path A (common on your Altima): Dipstick present
  • With engine idling, remove the CVT dipstick using shop rags (it may have a locking cap).
  • Wipe, reinsert fully, then remove and read the level against the “HOT” marks (since you’re warming it to the check range).
  • If low, add small amounts (about 0.25 qt at a time) through the funnel with long hose, then recheck.
• Path B (if no dipstick): Overflow/level plug method
  • If your unit uses a level plug, you must keep the CVT fluid at the correct temperature and follow the level-plug check procedure while idling.
  • Tell me if you do NOT see a dipstick/locking cap on top, and I’ll give you the exact level-plug steps for your Altima.

Step 8: Reinstall splash shield

• Reinstall the splash shield using the 10mm socket, 3/8" drive ratchet, Phillips screwdriver, and trim clip remover.
• Lower the car safely using the floor jack.

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✅ After Repair

• Check for leaks around the drain plug after a short drive.
• Test drive gently for 10–15 minutes. Confirm no flare/slip, no warning lights, and smooth engagement.
• Recheck the CVT fluid level again at the correct temperature (same method as above).

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💰 DIY vs Shop Cost

Shop Cost: $250-$450 (parts + labor)

DIY Cost: $60-$120 (parts only)

You Save: $130-$390 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.0-2.0 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.