TH55655 is a four-piece polished stainless trim kit designed for the lower rocker-panel area of the 2015-2017 Navigator. It is cosmetic protection and styling, not a structural rocker repair.
Fitment first
What to confirm before buying
The source record limits TH55655 to four-door Lincoln Navigator applications from 2015 through 2017 and specifically says it does not fit the longer L model. Confirm that the vehicle is the standard body length before using the model name and year as proof of fit. Also inspect the lower molding and running-board arrangement. TH55655 is the 5-inch upper kit, while the nearby TH55656 is a narrower 3.375-inch application associated with the retractable step-bar layout. They are not interchangeable visual variants. Measure and photograph the area from the bottom of the molding downward, compare the piece count and shape with all four body sections, and check for accessories that occupy the same surface. Existing rocker covers, replacement doors, collision repairs, nonfactory molding, or altered running boards can change the available adhesive area. If the catalog, body length, and physical layout do not all agree, pause before exposing any adhesive.
Product at a glance
| Part | QAA TH55655 |
|---|---|
| Pieces | 4 |
| Material | 26-gauge 304 stainless steel |
| Width | 5 inches |
How this accessory works in practice
QAA TH55655 is a four-piece polished stainless-steel accent kit for the lower body of listed 2015-2017 Lincoln Navigator models. Each piece is 5 inches wide, and the saved product description identifies 26-gauge 304 stainless steel with pre-applied 3M adhesive. This is the wider upper rocker-panel treatment: the pieces extend downward from the bottom of the molding to the specified width. The polished surface creates a mirror-like chrome appearance, and a removable protective film covers the finish during handling. Its job is visual continuity along the lower doors and rocker area. It is not a structural rocker panel, rust repair, impact guard, or substitute for damaged bodywork. The quality of the result depends as much on correct vehicle configuration and alignment as on the trim itself.
Daily use and ownership
Once installed, TH55655 becomes part of the vehicle's exterior appearance and receives the same road film, wash chemicals, water, and small debris as the lower doors. The stainless face can make a standard Navigator look more chrome-trimmed, but it does not make the rocker area safe from dents or conceal corrosion responsibly. A rigid-looking polished strip can still show waves when it is applied over an uneven panel. Because the kit uses adhesive rather than drilled fasteners, clean edges and complete contact are central to long-term presentation. Occupants should continue to use the running board or step as intended and should not treat the trim itself as a step, jack point, or handhold.
Installation and setup
Begin with an intact, dry surface and read the QAA temperature and preparation requirements before scheduling the work. Wash away dirt, then remove wax, polish, silicone dressing, and oily residue with an automotive-safe preparation product. Do not install over active rust, bubbling paint, loose clear coat, deep dents, or fresh body repair that has not completed its required cure. Dry-fit all four panels with the adhesive liners untouched. Identify left, right, front, and rear pieces, and use low-tack masking tape to mark a common upper or lower reference line. View the vehicle from several steps away to catch a slope that is difficult to see up close. During final placement, expose and press the adhesive only in the sequence given by the instructions; once a long stainless panel bonds crookedly, lifting and resetting it can deform the piece or weaken adhesion. Apply even hand pressure across the full contact area without creasing the metal. Keep the factory protective film in place while positioning if the instructions allow, then remove it after the pieces are secure. Respect the stated adhesive cure period before washing, driving in severe weather, or disturbing the edges.
Care and maintenance
Use mild automotive wash solution and a soft mitt on the polished stainless surface. Rinse grit before wiping because mirror-finish trim can make fine scratches more visible. Avoid aggressive compounds unless QAA specifically approves them for this finish. Inspect leading edges, door gaps, and lower corners for trapped dirt or lifting, especially after winter road treatment or body-shop work. Do not aim high-pressure spray directly under an edge. If a panel starts to separate, investigate contamination, paint failure, or impact rather than pressing a dirty edge back into place. Keep drainage paths and door seams clear.
Final checks before ordering
Measure every door and rocker section that will receive trim and compare those lengths with the four supplied pieces. Photograph the vehicle squarely from both sides, then mark repaired panels, replaced doors, edge guards, running-board hardware, and any molding that changes the adhesive path. Check the forecast and work area as well: a long adhesive panel is far easier to align indoors at the temperature specified by QAA than outdoors in wind or direct sun. Have low-tack tape, a clean measuring reference, suitable surface cleaner, and enough uninterrupted curing time ready before removing a liner. A complete dry fit should look correct from several metres away.
Buy it when
- Choose TH55655 when the vehicle is a confirmed standard-length, four-door 2015-2017 Navigator with the body layout shown for the 5-inch upper kit, and the goal is a polished lower-body accent without drilling. It suits an owner willing to spend time on surface preparation, measuring, and one-pass alignment.
Skip it when
- Skip this kit for a Navigator L, for a retractable-step layout that calls for TH55656, or when the rocker and door surfaces are rusty, loose, freshly repaired, or uneven. It is also unsuitable when the goal is structural protection, dent repair, hidden corrosion treatment, or a removable trim piece that can be repositioned repeatedly.
Frequently asked questions
What separates TH55655 from TH55656?
TH55655 is the wider four-piece kit with 5-inch panels extending down from the lower molding. TH55656 is 3.375 inches wide and is associated with the retractable step-bar application. Select by vehicle layout, not by which width looks better in a photograph.
Does TH55655 fit the Navigator L?
No. The saved fitment description explicitly excludes the L model. The longer body changes the panel dimensions, so a standard-wheelbase four-piece set should not be stretched, spaced, or trimmed to imitate the correct application.
Can the trim cover rust or rocker damage?
It may hide an area visually, but that is not a sound repair. Rust, loose paint, dents, and uneven filler can prevent full adhesive contact and continue deteriorating underneath. Repair and finish the body correctly before considering cosmetic stainless trim.
Is drilling required for this kit?
The product record describes pre-applied 3M adhesive rather than drilled attachment. That makes cleaning, temperature, dry fitting, and alignment especially important. Follow the supplied QAA instructions because the adhesive should not be treated as endlessly repositionable.
Related fitment guides
- QAA TH55656 Rocker Trim for Navigator with Retractable Step
- Replacement Exterior Door Handle for 2003-2017 Expedition and Navigator
- Perforated Plenum Cover for 2015 Challenger SRT 392 6.4L
Technical reference
Application and technical details were checked against Official QAA TH55655 product page. Use the manufacturer application data and the vehicle’s own measurements as the final fitment check.