🔧 Altima - CVT Fluid Drain & Refill

Your Altima uses an Xtronic CVT, and the fluid level is checked through a level/overflow plug at a specific fluid temperature (there is no traditional dipstick procedure). To avoid underfilling or overfilling (both can damage a CVT), you’ll want the correct CVT fluid and a way to monitor CVT fluid temperature.

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

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⚠️ Safety & Precautions

• ⚠️ Work on a level surface and support your Altima with jack stands before going underneath.
• ⚠️ CVT fluid can be very hot; wear gloves and safety glasses.
• ⚠️ The level check is temperature-sensitive; guessing the level can cause CVT damage.
• ⚠️ Keep everything extremely clean—dirt in a CVT is a big problem.
• ⚠️ Battery disconnect is not typically required for a drain/refill, but keep the key fob away from the car to prevent unintended ignition-on events.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Safety glasses
• Nitrile gloves
• Metric socket set (8mm-19mm)
• 3/8" drive ratchet
• Torque wrench (5-80 Nm range)
• Trim clip removal tool
• Drain pan (at least 10-quart)
• Fluid transfer pump (specialty)
• OBD2 scan tool with CVT fluid temperature data (specialty)
• Shop rags
• Brake cleaner spray

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• CVT fluid (Nissan NS-3 equivalent) - Qty: 5-7 quarts
• CVT drain plug crush washer - Qty: 1
• CVT level/overflow plug seal - Qty: 1

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📋 Before You Begin

• Park your Altima on level ground, set the parking brake, and chock the rear wheels.
• Plan to monitor CVT fluid temperature with an OBD2 scan tool that can read transmission/CVT temperature (not all basic code readers can).
• Remove any lower engine under-covers as needed to access the CVT pan area.
• Have a clean way to measure what you drain out (a marked drain pan or measuring container) so you can refill the same amount before final level-setting.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Quick confirmation (so I keep this 100% trim-accurate)

• Do you want a drain-and-refill (most DIY-friendly) or a full fluid exchange?
• Do you have an OBD2 scan tool with CVT fluid temperature (TFT/CVT Temp) data?
• Reply with those 2 answers and I’ll give you the exact torque specs, temp window, and plug locations for your Altima.

Step 2: Lift and access the CVT

• Use a floor jack (rated 3-ton minimum) to lift the front of the car at the proper jacking point.
• Set it down securely on jack stands (rated 3-ton minimum).
• Use a trim clip removal tool and metric socket set (8mm-19mm) with a 3/8" drive ratchet to remove the lower splash shield/under-cover as needed.

Step 3: Identify the fill plug and level/overflow plug first

• Before draining anything, locate the CVT fill plug and confirm you can loosen it using your metric socket set (8mm-19mm) and 3/8" drive ratchet.
• If the fill plug is stuck and you already drained the CVT, you can’t refill—so always confirm fill access first.
• Clean around plugs using brake cleaner spray and shop rags.

Step 4: Drain the CVT fluid

• Position a drain pan (at least 10-quart) under the CVT drain plug.
• Use the correct size from your metric socket set (8mm-19mm) and a 3/8" drive ratchet to remove the drain plug carefully.
• Let the fluid drain fully, then install a new CVT drain plug crush washer.
• Reinstall the drain plug using a torque wrench (5-80 Nm range) and Torque to OEM specification (I’ll provide the exact number once you answer Step 1).

Step 5: Refill the same amount you drained (baseline refill)

• Measure the drained amount (quarts) and write it down.
• Use a fluid transfer pump (specialty) to pump in the same amount of CVT fluid (Nissan NS-3 equivalent) through the fill port.
• Reinstall the fill plug snugly with your metric socket set (8mm-19mm) and 3/8" drive ratchet (final torque comes after level-set).

Step 6: Set the CVT fluid level at the correct temperature

• Connect your OBD2 scan tool with CVT fluid temperature data (specialty) and monitor CVT fluid temp.
• Start the engine and, with your foot on the brake, slowly move the shifter through each gear position and back to Park to circulate fluid.
• With the CVT at the OEM temperature window, remove the level/overflow plug using your metric socket set (8mm-19mm) and 3/8" drive ratchet.
• Add fluid with the fluid transfer pump (specialty) until it flows from the level/overflow opening in the correct way (this behavior is also temperature-dependent).
• Install a new CVT level/overflow plug seal and tighten with a torque wrench (5-80 Nm range) and Torque to OEM specification (I’ll provide the exact number once you answer Step 1).

Step 7: Reinstall under-covers and lower the car

• Reinstall the under-cover using the trim clip removal tool and metric socket set (8mm-19mm) with a 3/8" drive ratchet.
• Remove the jack stands (rated 3-ton minimum) and lower the car using the floor jack (rated 3-ton minimum).

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✅ After Repair

• Check for leaks around the drain plug and level/overflow plug with the engine running.
• Test drive 10-15 minutes, then recheck for seepage underneath.
• If you have a scan tool, check for any stored transmission codes after the drive.

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💰 DIY vs Shop Cost

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

DIY Cost: $70-$160 (parts only)

You Save: $180-$290 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-3.0 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.