NHTSA ID Number: 10186409
Manufacturer Communication Number: TSB 21-2004
Summary
Some 2013-2020 MKZ vehicles may need the exterior rear view mirror replaced. The replacement exterior mirror will have different wiring than the originally equipped mirror. Follow the Service Procedure steps below to modify the vehicle-side wiring harness to accept the replacement mirror wiring.
Model:
2013-2020 MKZ
Issue: Some 2013-2020 MKZ vehicles may need the exterior rear view mirror replaced. The replacement exterior mirror will have different wiring than the original exterior rear view mirror. Follow the Service Procedure steps below to modify the vehicle-side wiring harness to accept the replacement exterior rear view mirror wiring.
Action: Follow the Service Procedure steps to replace the wiring on vehicles that meet all of the following criteria:
- 2013-2020 MKZ
- The vehicle’s original exterior rear view mirror needs replacement
NOTE: Part quantity refers to the number of that service part number required, which may be different than the number of individual pieces. Service part numbers contain 1 piece unless otherwise stated. “As Needed” indicates the part is required but the number may vary or is not a whole number; parts can be billed out as non-whole numbers, including less than 1.
Parts
| Description | Quantity | Part Number |
| Black Female 8-Pin Pigtail Kit | 1 | CU2Z-14S411-ALB |
| Gray Female 8-Pin Pigtail Kit | 1 | FU2Z-14S411-AB |
| Coroplast Electrical Wire Harness Tape (Rotunda) | As Needed | NAI837X
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Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API |
Service Procedure
1. Remove the affected exterior rear view mirror. Refer to Workshop Manual (WSM), Section 501-09.
2. Remove the original 16-pin door harness mirror connector. To remove the connector, follow the wiring repair kit instructions included with the pigtail kit (Figure 1) and cut the wires 13 mm (1/2 inch) from the connector and splice to the 8-pin gray and 8-pin black female connector pigtails.
(1). To gain enough access to perform the splices, pull the harness connector through the wire harness grommet hole below the access hole for the mirror bolts.
(2). Using a small flat head screwdriver, remove the white christmas tree body-to-connector retainer from the original connector and install it on the replacement gray female connector.
(3). Tape the female connectors together using electrical or foam tape.
Figure 1
3. Install the new exterior rear view mirror. Refer to WSM, Section 501-09.
16 Affected Products
Vehicles
1 Associated Document
Manufacturer Communications
21-2004
07 January 2020
MC-10186409-0001.pdf 119.921KB
NHTSA ID Number: 10183418
Manufacturer Communication Number: TSB 20-2386
Summary
Some 2013-2020 MKZ vehicles may need the exterior rear view mirror replaced. The replacement exterior mirror will have different wiring than the originally equipped mirror. Follow the Service Procedure steps below to modify the vehicle-side wiring harness to accept the replacement mirror wiring.
1 Associated Document
Manufacturer Communications
20-2386
09 November 2020
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- This Wire Loom Tape features an extremely strong adhesive but does not turn into a messy goo. Rated to last up to 6 years and can easily get you through 150k miles of mileage.
- Its bi-directional weave makes it puncture-resistant and abrasion and corrosion-resistant. This automotive felt tape preserves cables in their pristine condition.
- This engine tape wrap is similar, if not better, in thickness, tensile strength and looks with OEM wire harness tapes. Extra-sticky adhesive enables users to bundle hard-to-reach cables quickly.
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- Sports a race-spec heavy-duty bundling performance but cleanly tears with just bare hands, EMPOWERING average car owners with LITTLE TO NO EXPERIENCE in automotive maintenance to achieve PROFESSIONAL-GRADE results in function and form.
- This Wire Loom Tape features an extremely strong adhesive but does not turn into a messy goo. Rated to last up to 6 years and can easily get you through 150k miles of mileage.
- Its bi-directional weave makes it puncture-resistant and abrasion and corrosion-resistant. This automotive felt tape preserves cables in their pristine condition.
- This engine tape wrap is similar, if not better, in thickness, tensile strength and looks with OEM wire harness tapes. Extra-sticky adhesive enables users to bundle hard-to-reach cables quickly.
Last update on 2026-06-18 / Affiliate links / Images from Amazon Product Advertising API
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Warranty Status: Eligible under provisions of New Vehicle Limited Warranty (NVLW)/Service Part Warranty (SPW)/Special Service Part (SSP)/Extended Service Plan (ESP) coverage. Limits/policies/prior approvals are not altered by a TSB. NVLW/SPW/SSP/ESP coverage limits are determined by the identified causal part and verified using the OASIS part coverage tool. Labor Times Description Operation No. Time 2013-2020 MKZ: Replace The Electrical Connectors On One (1) Exterior Mirror (Do Not Use With Any Other Labor Operations) 212004A 3.0 Hrs. 2013-2020 MKZ: Replace The Electrical Connectors On Both (2) Exterior Mirrors (Do Not Use With Any Other Labor Operations) 2120048 5.4 Hrs. Repair/Claim Coding Causal Part: 17683 Condition Code: 42
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