This tutorial explains how to replace the key fob battery in Volvo S40 and Volvo V40 (1995 to 2004).

If your Volvo remote fob range of transmission is noticeably reduced or if it completely fails to open and close the car as usual, this indicates that the battery is weak and should be replaced.

Depending on your car year there are three different kinds of remote fob styles, all pictured below. (A for cars years 1995 to 1999, B for 1999 to 2003, and C is the integrated key fob for cars years 2003- on cars). See instructions below depending on fob type

Remote fob 1995 to 1999 years (Type A)

Step 1. Open the remote control by twisting a coin in the ring between front and back (leave the
ring in place).
Step 2. Replace the batteries (2x type CR 2016 3v batteries) with the plus side down

Remote fob 1999 to 2003 years (Type B)

Step 1. Open the remote control by twisting a coin in the ring between front and back (leave the
ring in place).
Step 2. Replace the batteries. (2x type CR 2016 3v batteries)

Remote fob 2003 to 2004 years (Type C)

Step 1. Open the remote control by twisting a coin in the ring between the front and rear sections (leave the ring in place).
Step 2. Replace the batteries (2x type CR 2025 3v batteries), with the plus-side upward.
Step 3. Reinstall the cover, making sure it is secured tightly

The information in this page is suitable on the following model years and versions:
– Volvo S40 / V40 1.8 116 hp B4184S, made / sold in 1996, 1997, 1998 and 1999
– Volvo S40 / V40 1.8 122 hp B4184S2, made / sold in 2000, 2001, 2002, 2003 and 2004
– Volvo S40 / V40 1.8 116 hp B4184S3, made / sold in 2000, 2001, 2002, 2003 and 2004
– Volvo S40 / V40 1.8 Bi-Fuel 120 hp B4184S9, made / sold in 2000, 2001, 2002, 2003 and 2004
– Volvo S40 / V40 1.8 Bi-Fuel 116 hp B4184S10, made / sold in 2000, 2001, 2002, 2003 and 2004
– Volvo S40 / V40 1.8 GDI 125 hp B4184SM, made / sold in 1998, 1999, 2000 and 2001
– Volvo S40 / V40 1.8 GDI 122 hp B4184SJ, made / sold in 2001, 2002, 2003 and 2004
– Volvo S40 / V40 2.0 136 hp B4204S, made / sold in 1996, 1997, 1998 and 1999
– Volvo S40 / V40 2.0 137 hp B4204S2, made / sold in 2000, 2001, 2002, 2003 and 2004
– Volvo S40 / V40 1.6 105 hp B4164S, made / sold in 1997, 1998 and 1999
– Volvo S40 / V40 1.6 109 hp B4164S2, made / sold in 2000, 2001, 2002, 2003 and 2004
– Volvo S40 / V40 T4 1.9 200 hp B4194T, made / sold in 1998 and 1999
– Volvo S40 / V40 T4 1.9 200 hp B4194T2, made / sold in 2000
– Volvo S40 / V40 2.0T 160 hp B4204T, made / sold in 1998 and 1999
– Volvo S40 / V40 2.0T 160 hp B4204T2, made / sold in 2000
– Volvo S40 / V40 2.0T 163 hp B4204T3, made / sold in 2001, 2002, 2003 and 2004
– Volvo S40 / V40 2.0T 170 hp B4204T4, made / sold in 2003 and 2004
– Volvo S40 / V40 T4 2.0 200 hp B4204T5, made / sold in 2001, 2002 and 2003
– Volvo S40 / V40 1.9TD 90 hp D4192T, made / sold in 1996, 1997, 1998 and 1999
– Volvo S40 / V40 1.9D 95 hp D4192T2, made / sold in 1999 and 2000
– Volvo S40 / V40 1.9D CR 115 hp D4192T3, made / sold in 2001, 2002, 2003 and 2004
– Volvo S40 / V40 1.9D 102 hp D4192T4, made / sold in 2001, 2002, 2003 and 2004