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Tesla 3 Manual
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TN-18-16-001 R2
December 15, 2021
Model:
Model 3
Model Y
Inspect the Model 3 and Model Y HV Battery for Underside
Damage
Tech Notes are announcements that help to communicate and track new information about Tesla Service concerns. Such
concerns may or may not be VIN specific. These instructions assume knowledge of motor vehicle and high voltage
electrical component repairs, and should only be executed by trained professionals. Tesla assumes no liability for injury or
property damage due to a failure to properly follow these instructions or for repairs attempted by unqualified individuals.
This Tech Note supersedes TN-18-16-001 R1, dated 12-Jun-20. Each content change is marked by a vertical line in the
left margin. Discard the previous version and replace it with this one.
Whenever the vehicle is raised, or if the customer has indicated possible damage, the underside of the vehicle, including
the High Voltage (HV) battery, should be visually inspected for damage. HV battery damage may include:
•
Dents, holes, cracks, or tears
•
Corrosion or moisture accumulation
•
Evidence of a previous thermal event, such as smoke residue, discoloration, deformation, melted seals, metallic
platter, or abnormal odor
•
Rupture or disassembly
•
Coolant or electrolyte leakage
NOTE: If a vehicle is brought into a Body Shop with visible damage to the bottom of the HV battery, the Body Shop
should contact Tesla:
•
In Europe, Middle East, and Africa: Contact
•
All other regions: Contact your local Tesla Service Center.
The Body Shop should not try to repair the HV battery damage. Only Tesla Service Centers should try to repair the
damaged HV battery.
TN-18-16-001 R2
Vehicle System:
16 - Battery System
EMEABodyRepair@Tesla.com.
Tesla, Inc.
Technical Note
Region:
All
Page 1 of 15

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Summary of Contents for Tesla 3

  • Page 1 EMEABodyRepair@Tesla.com. • All other regions: Contact your local Tesla Service Center. The Body Shop should not try to repair the HV battery damage. Only Tesla Service Centers should try to repair the damaged HV battery. TN-18-16-001 R2 Page 1 of 15...
  • Page 2 S, X, 3, and Y”. Gases or smoke exiting a lithium-ion HV battery are likely flammable and could ignite at any time. WARNING: Avoid contact with gases escaping from the HV battery. Vented gases might irritate the eyes, skin, and throat.
  • Page 3 • Do not weld near HV batteries. HV Battery Assembly Underside The underside of the HV battery assembly has several key components, as shown in Figure 3. Figure 3 – HV battery assembly components TN-18-16-001 R2 Page 3 of 15...
  • Page 4 The bottom of the HV battery assembly can be divided into a grid to make it easier to track and report damage (Figure 4). Figure 4 – HV battery grid layout The grid locations for the underside components of the HV battery assembly are shown in Figure 5. TN-18-16-001 R2 Page 4 of 15...
  • Page 5 HV Battery Assembly Part Grid Locations A24 – A30 Front skid plate A23 – J23, A31 – J31 Side ski zones A25 – J25, A29 – J29 Longitudinal skis A27 – J27 Center ski A24 – J24, A26 – J26, A28 – J28, A30 – J30 Baseplate: K24 –...

  • Page 6: Front Skid Plate

    3. Collect the following information and upload it to the session: a. Several pictures of the damage, taken with a high-resolution camera: If there isn’t a visible open hole, crack, or tear, measure the depth of the HV battery enclosure damage (Figure 7) while wearing proper PPE.
  • Page 7 2. Remove the front skid plate (Figure 10) (refer to Service Manual procedure 16102002). Figure 10 – Skid plate bolts 3. Inspect the HV cables and passthroughs. 4. If there is damage to the leading edge above the front skid plate, see “Leading Edge” section.
  • Page 8 NOTE: The bolt that threads into the doubler is circled in Figure 11 and Figure 12. There is another bolt symmetrically on the other side of the vehicle. These bolts are prone to shearing in the event of front skid plate damage (Figure 12).
  • Page 9 Side Skis There are two side skis on each side of the HV battery (Figure 13). For each side ski, there is a “Side Ski Zone,” which extends 5 inches (127 mm) inward from the edge of the HV battery. Figure 13 –...
  • Page 10 NOTE: Figure 16 shows an example of torn center ski that also damaged the HV cables (Figure 17). It is important to inspect for damage to the HV cables and baseplate underneath the ski. 3. Inspect the baseplate under the center ski (See “Baseplate” section below). TN-18-16-001 R2...
  • Page 11 Suggest repair to customer: • Recommend the replacement of the center ski if the center ski, or part of the ski, is detached from the HV battery. • Recommend the replacement of the HV cables if the HV cables are damaged. •...

  • Page 12: Base Plate

    Suggest repair to customer: • Deburr the area with a hand deburring tool to remove the sharp edges if sharp edges are found. • Recommend the replacement of the longitudinal ski if the longitudinal ski is detached. • Recommend the replacement of the fastener if a fastener attaching the longitudinal ski to the HV battery enclosure is damaged or stripped.

  • Page 13: Leading Edge

    Figure 22 – Dents in the baseplate Figure 21 – Gouges in the baseplate Leading Edge The leading edge of the baseplate is forward of (or above) the dashed line (Figure 23). Anything behind or below the dotted line is in the Baseplate section. Figure 23 –...
  • Page 14 2. Remove the rear skid plate (Figure 25) (refer to Service Manual procedure 16102202). Figure 25 –Skid plate 3. Inspect the HV cables and passthroughs and replace any compromised components. 4. Remove and assess damage to components such as HV cables, baseplate, fasteners, etc.
  • Page 15 A passthrough is damaged. The HV battery enclosure fails leak test due to impact. The HV battery enclosure has low isolation due to impact. For feedback on the accuracy of this document, email ServiceBulletinFeedback@tesla.com. TN-18-16-001 R2 Page 15 of 15...

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