If your touchpad touchpad keyboard cable is damaged,don't need to change new device, just buy this item and replace your damage Flex Cable , let your trackpad work again.

Identifying Numbers:
PPN: 821-01050-A,821-01050, 821-01669.
Package including:1x New Trackpad IPD Flex Cable
Compatibility:
-Compatible with MacBook Pro 15" Touch Bar Late 2016 A1707 (EMC 3072)
For MacBookPro13,3 Late 2016: MLH32LL/A or MLW72LL/A (2.6 GHz Core i7)
For MacBookPro13,3 Late 2016: MLH42LL/A or MLW82LL/A (2.7 GHz Core i7)
For MacBookPro13,3 Late 2016: BTO/CTO (2.9 GHz Core i7)
-Compatible with MacBook Pro 15" Touch Bar 2017 A1707 (EMC 3162)
For MacBookPro14,3 Mid 2017: MPTR2LL/A or MPTU2LL/A (2.8 GHz Core i7)
For MacBookPro14,3 Mid 2017: MPTT2LL/A or MPTV2LL/A (2.9 GHz Core i7)
For MacBookPro14,3 Mid 2017: BTO/CTO (3.1 GHz Core i7)
-Compatible with MacBook Pro 15" Touch Bar 2018 A1990 (EMC 3215)
For MacBookPro15,1 2018: MR932LL/A or MR962LL/A (2.2 GHz Core i7)
For MacBookPro15,1 2018: MR942LL/A or MR972LL/A (2.6 GHz Core i7)
For MacBookPro15,3 2018: BTO/CTO (2.6 GHz Core i7)
For MacBookPro15,3 2018: BTO/CTO (2.9 GHz Core i9)
-Compatible with MacBook Pro 15" Touch Bar 2019 A1990 (EMC 3359)
For MacBookPro15,1 2019: MV902LL/A or MV922LL/A (2.6 GHz Core i7)
For MacBookPro15,1 2019: MV912LL/A or MV932LL/A (2.3 GHz Core i9)
For MacBookPro15,1 2019: BTO (2.4 GHz Core i9)
For MacBookPro15,3 2019: BTO (2.3 GHz Core i9)
For MacBookPro15,3 2019: BTO (2.4 GHz Core i9)
-Note:Both of the Model "Axxxx" and EMC "xxxx " Number are located beneath the lower case of the laptop, please double check it to determine the compatibility.