GROUP
Body
DATE

Technical Service Bulletin
SUBJECT:

November, 2019

NUMBER
19-BD-009H
MODEL(S)
Sonata (LFa)

TRUNK LID TORSION BAR INSPECTION & REPLACEMENT

Description: On certain Sonata (LF) vehicles equipped with smart trunk, the trunk lid may not open to
the desired height when using the smart trunk feature. Follow the procedure in the bulletin to inspect
the trunk lid opening height and replace the torsion bars if required.

Applicable Vehicles: 2015 ~ 2017 model year Sonata (LFa) equipped with Smart Trunk Feature
Parts Information:
PART NAME
BAR-TRUNK LID HINGE
TORSION LH (Non-LED)
BAR-TRUNK LID HINGE
TORSION RH (Non-LED)
BAR-TRUNK LID HINGE
TORSION LH (LED)
BAR-TRUNK LID HINGE
TORSION RH (LED)

PART NUMBER

IMAGE

79273-C1010

REMARK
Only applicable for
vehicles with nonLED tail lamps

79283-C1010
79273-C2000

Only applicable for
vehicles with LED
tail lamps

79283-C2000

Warranty Information:
Model

Op. Code

Sonata
79273R00
(LFa)

Operation

BAR-TRUNK LID HINGE
TORSION

Op. Time

0.3 M/H

Causal Parts
79273-C1010
79283-C1010
79273-C2000
79283-C2000

Nature Cause
Code Code

I14

ZZ3

Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair

SUBJECT:

TRUNK LID TORSION BAR INSPECTION & REPLACEMENT

Inspection Procedure:
1. Using the key fob, perform an open and close
cycle of the trunk lid ten times.

2. Open the trunk lid and measure the trunk
opening height using a ruler or measuring
tape. The measurement should be taken from
the center of the bumper to the bottom of the
trunk lid.

NOTICE
To assist in taking an accurate measurement,
place a thin piece of cardboard on the bumper
to accurately measure the opening height,
vertically along the trunk lid opening axis.

3. If the trunk lid opens more than 7.5 inches
(190.5 mm), no further action is required. The
trunk is functioning properly. The inspection
procedure is complete and submit for
applicable labor.
If the trunk lid does not open more than 7.5
inches (190.5 mm), proceed to step 4 to
replace the torsion bars.

TSB #: 19-BD-009H

Page 2 of 5
SUBJECT:

TRUNK LID TORSION BAR INSPECTION & REPLACEMENT

SUBJECT:

!

WARNING
There is an increase in tension while holding the vice grips after
disconnecting the hinge from the torsion bar. If caution is not taken there
may be a risk of injury.

4. After opening the trunk, use a vice grip to push
down on the outer side of the torsion bar away
from the hinge (A).

A
B

Ensure the vice grip holds on to the outer
edge of the torsion bar, outer side of the hinge
(B).

5. Pull the vice grips downward to release the
hinge (A) from the torsion bar and push the
hinge toward the outside of the trunk.

TSB #: 19-BD-009H

A

Page 3 of 5
SUBJECT:

SUBJECT:

TRUNK LID TORSION BAR INSPECTION & REPLACEMENT

6. After releasing the hinge (A) from the torsion
bar, slowly lift the torsion bar held by the vice
grip and release the vice grip.

A

7. Disconnect the released torsion bar from the
center clip (C).
C

8. Remove the loose torsion bar from the
mounting point on the opposite side and then
remove from the vehicle.

!

WARNING
After removing the first torsion bar, place a
prop rod that is approximately 5 feet long to
hold the trunk lid open while performing the
procedure.

TSB #: 19-BD-009H

Page 4 of 5
SUBJECT:

TRUNK LID TORSION BAR INSPECTION & REPLACEMENT

SUBJECT:

9. Perform the same removal process to the
other torsion bar mentioned above to the
opposite side.

10. Install the new torsion bars in reverse order of
the removal.

NOTICE




The white/green labeled torsion bar is
installed to the top of the clip.
The yellow/pink labeled torsion bar is
installed to the bottom of the clip.

Green labeled torsion bar on top
Pink labeled torsion bar on bottom

White labeled torsion bar on top
Yellow labeled torsion bar on bottom

11. Check for proper operation of the trunk by
performing an open and close cycle five times
using the key fob. Perform the same
measurements in step 2 and 3 to confirm that
the proper specification is met.
12. The service procedure is now complete.

TSB #: 19-BD-009H

Page 5 of 5
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