Sentra SE-R Spec V L4-2.5L (QR25DE) (2002)
a.
Look down into the Heater Unit Assembly to visually see if any foam seals are missing or loose on top of each door (see Figure 3).
b.
Use your hands to feel around the bottom of each door for any missing or loose foam seals (see Figures 3 and 4)
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If only top foam seals are missing or loose, replace only the top seals (see step 8 and Figure 3) Do not remove the Heater Unit
Assembly.