DieselDavid
Veteran Member
The correct battery size for the 2005.5 Jetta TDI with engine code BRM is 48H6, same as the 2006 Jetta TDI.
A few online databases incorrectly show the battery size for the 2005.5 Jetta TDI with engine code BRM as 94R. This one is about 1.5 inches longer than the 48H6 battery and does not fit inside the battery box nor inside the insulation jacket.
This last weekend I replaced the original battery in my 2005.5 Jetta TDI, first using the incorrect size (94R) and then using the correct size (48H6). Beside the size difference, here is what else I learned - most from the Bentley manual:
- When the battery power is disconnected the clock time, trip odometer, and other MFI data will be lost.
- The front section of the battery box is removed by releasing two retaining tabs on the lower front area.
- The battery mounting bolt is on the passenger side. To access it, disconnect the air intake tubing behind the MAF by squeezing the band clamp, moving the band clamp toward the "elbow" of the air intake tubing, and pulling the air intake tubing off. We only need to move it out of the way.
- The battery cables are secured with little 10mm bolts. After loosening these I could not remove them from the battery posts (always remove negative cable first and always install negative cable last) until after I sprayed a little bit of Liquid Wrench in the area. When tightening these little bolts, the torque spec is 80 inch pounds or 9 Nm.
- The battery is very heavy - about 50 pounds. It has two handles that fold upward from the center area on top. Be careful.
- The battery mounting bolt is 13mm. It holds a small plate that goes into the groove along the bottom edges of the battery. When tightening this bolt, the torque spec is 15 foot pounds or 20 Nm. We can squeeze our hand under the air intake tube to make sure the bolt and small plate don't get lost.
- After reconnecting the battery we need to reset the time on the clock, reinitialize the steering angle sensor, and reinitialize the pinch protection for the windows and sunroof. Here is what to do:
1) Switch the ignition on, then off.
2) Reset the clock to local time.
3) Start the engine. The instrument panel warning lights for power steering and anti-skidding will be lit. Don't panic.
4) Completely open and close all the power windows and sunroof.
5) Drive the car straight at 9 MPH to 13 MPH. The instrument panel warning lights will stop being lit.
A few online databases incorrectly show the battery size for the 2005.5 Jetta TDI with engine code BRM as 94R. This one is about 1.5 inches longer than the 48H6 battery and does not fit inside the battery box nor inside the insulation jacket.
This last weekend I replaced the original battery in my 2005.5 Jetta TDI, first using the incorrect size (94R) and then using the correct size (48H6). Beside the size difference, here is what else I learned - most from the Bentley manual:
- When the battery power is disconnected the clock time, trip odometer, and other MFI data will be lost.
- The front section of the battery box is removed by releasing two retaining tabs on the lower front area.
- The battery mounting bolt is on the passenger side. To access it, disconnect the air intake tubing behind the MAF by squeezing the band clamp, moving the band clamp toward the "elbow" of the air intake tubing, and pulling the air intake tubing off. We only need to move it out of the way.
- The battery cables are secured with little 10mm bolts. After loosening these I could not remove them from the battery posts (always remove negative cable first and always install negative cable last) until after I sprayed a little bit of Liquid Wrench in the area. When tightening these little bolts, the torque spec is 80 inch pounds or 9 Nm.
- The battery is very heavy - about 50 pounds. It has two handles that fold upward from the center area on top. Be careful.
- The battery mounting bolt is 13mm. It holds a small plate that goes into the groove along the bottom edges of the battery. When tightening this bolt, the torque spec is 15 foot pounds or 20 Nm. We can squeeze our hand under the air intake tube to make sure the bolt and small plate don't get lost.
- After reconnecting the battery we need to reset the time on the clock, reinitialize the steering angle sensor, and reinitialize the pinch protection for the windows and sunroof. Here is what to do:
1) Switch the ignition on, then off.
2) Reset the clock to local time.
3) Start the engine. The instrument panel warning lights for power steering and anti-skidding will be lit. Don't panic.
4) Completely open and close all the power windows and sunroof.
5) Drive the car straight at 9 MPH to 13 MPH. The instrument panel warning lights will stop being lit.