Rear seat removal - 2009 Hyundai Sonata

https://www.youtube.com/watch?v=zCOVX1APhI4

Preliminary Procedures
Remove the rear seat. Refer to Rear Seat Replacement.
Remove the left quarter lower trim panel. Refer to Quarter Lower Rear Trim Panel Replacement.


Preliminary Procedure
Remove the rear compartment floor stowage compartment tray. Refer to Rear Floor Trim Plate Replacement.
1
Rear Seat Nut (Qty: 6)
Caution: Refer to Fastener Caution in the Preface section.
Tip
Roll the seat forward enough to get access to the nut that attaches the center seat belt assembly to the floor.
Tighten
45 N·m (33 lb ft)
2
Rear Seat Bolt (Qty: 3)
Tip
• Adjust the seat forward or rearward to access the bolts.
• Remove the plastic trim pieces to gain access to the nuts.
Tighten
45 N·m (33 lb ft)
3
Rear Seat Assembly

Preliminary Procedures
Remove the quarter upper trim finish panel. Refer to Quarter Upper Trim Panel Replacement.
Remove the rear compartment trim panel. Refer to Rear Compartment Trim Panel Replacement.
Remove the floor trim plate. Refer to Rear Floor Trim Plate Replacement.
1
Quarter Lower Trim Finish Retainer (Qty: 2)
2
Quarter Lower Trim Finish Panel Assembly
Caution: Refer to Fastener Caution in the Preface section.
Procedure
Remove the cargo tie down loop anchor plates and bolts.
Remove the rear passenger seat belt guide.
Disconnect the rear passenger seat belt so that the trim panel can be removed around the seat belt. Refer to Rear Seat Belt Replacement.
Pull the trim panel toward the inside of the vehicle to disengage the retainers.
Tighten
9 N·m (80 lb in)
3
Quarter Lower Trim Finish Panel Retainer (Qty: 5)

The rear seat is four (4) pieces.
You will need two tools a 6mm and 8mm wrenches.
1.) Unbuckle the rear seat belts. 2.) Locate the bolt in the center part of the rear seat, between the cushion and the seat-back. Remove the bolt with a 6 mm socket wrench. 3.) Push down firmly on the front edge of the rear seat cushion and pull it toward you to unhook and remove the rear seat cushion. Push the seat belt stalks through the center holes and lift the cushion out of the Accord. 4.) Pull the lever on the side of the rear seat bolster to lower the rear seat-back, which must be in the down position to access its bolts. 5.) Slide the center seat belt toward the passenger side of the vehicle. Move the loop over the edge of the seat-back to prevent it from hindering removal. 6.) Remove the three bolts from the bottom edge of the rear seat-back, using an 8 mm socket wrench. One bolt is in the center; the other two bolts are on either side. 7.) Pull the rear seat-back out of the Accord. The remaining sections of the seat should be the two side bolsters. 8.) Remove the bolts from the bottom of the side bolsters with a 6 mm socket wrench. Push firmly against the first side bolster. Push it upward to slide it out of its mount. Repeat the process on the bolster on the other side to finish removing the Accord's rear seat.

This should take approximately 15-30 minutes depending hoe mechanically inclined a person is.

Hi, follow the instruction below......
Rear
See Figures 3, 4, 5 and 6

1. Remove the lower seat cushion by pulling straight up on the front portion and disengaging the clips. Then hinge the seat upward to release the rear clips.
   

Fig. 3: Pull up on the front of the lower seat cushion and disengage the clips

1. Remove upper rear seat back-to-chassis bolts.

Fig. 4: Remove the bolts behind the center armrest ...



Fig. 5: ... and the bolts on the lower corners ...



Fig. 6: ... Then pull up on the seat to disengage the three clips on the top of the seat

1. Remove rear seat back by tilting forward and pulling straight up.
   

To install:

1. Install the lower seat cushion and torque the lower rear seat-to-chassis bolts to 15-20 ft. lbs. (21-26 Nm).
2. Install the upper rear seat back cushion and torque the upper rear seat back-to-chassis bolts to 15-20 ft. lbs. (21-26 Nm)

I searched the owner's manual and there was no mention of folding the rear seats down. If you don't have a manual, you can get one here: http://www.extendedgmwarranty.com/owners-manual/buick/1999-Buick-Century.pdf

You can remove the seats following the instructions below from autozone.com.
Rear Seats
SEAT CUSHION

Fig. Typical W-Body rear seat cushion removal

1. Locate and remove the small bolts at the front lower edge of the seat cushion.
2. Pull the tabs on the rear cushion retainers.
3. Remove the seat cushion by lifting up and pulling out of the retainer.
4. Installation is the reverse of the removal procedure. Make sure the retainer tabs are snapped into place. Tighten the bolts to 18 ft. lbs. (25 Nm).

SEAT BACK

Fig. Typical W-Body rear seat back removal

1. Remove the seat cushion as described above.
2. Remove the anchor nuts securing the rear seat retainer at the bottom of the seat back.
3. Grasp the bottom of the seat back and swing upward to disengage the offsets on the upper frame bar from the hangers.
4. Lift the seat back upwards to remove from the vehicle.
5. Installation is the reverse of the removal process. Make sure the hooks on the seat back are properly installed to the hangers. Tighten the anchor nuts to 89 inch lbs. (10 Nm).

Rear
See Figures 3, 4, 5 and 6

1. Remove the lower seat cushion by pulling straight up on the front portion and disengaging the clips. Then hinge the seat upward to release the rear clips.
   

Fig. 3: Pull up on the front of the lower seat cushion and disengage the clips

1. Remove upper rear seat back-to-chassis bolts.

Fig. 4: Remove the bolts behind the center armrest ...



Fig. 5: ... and the bolts on the lower corners ...



Fig. 6: ... Then pull up on the seat to disengage the three clips on the top of the seat

1. Remove rear seat back by tilting forward and pulling straight up.
   

To install:

1. Install the lower seat cushion and torque the lower rear seat-to-chassis bolts to 15-20 ft. lbs. (21-26 Nm).
2. Install the upper rear seat back cushion and torque the upper rear seat back-to-chassis bolts to 15-20 ft. lbs. (21-26 Nm)

Hope help with this (remember rated this).

please don't forget to rate, thx.

Retractor and Tongue—Sedan
SPECIAL SERVICE TOOL(S) REQUIRED Description Tool Number Safety Belt Bolt Bit T77L-2100A
NOTE: Safety Belt Bolt Bit T77L-2100-A should be used for safety belt removal and installation.

Removal

1. Remove rear seat cushion. Refer to Section 01-10 .
   

Seat Cushion, Rear Sedan
Removal

1. Apply knee pressure to lower front portion of the rear seat cushion. Push rearward to disengage rear seat cushion pad and frame (600A88) from rear seat cushion front retainers (63370).
   

1. Remove rear seat cushion from vehicle.
   

1. Remove rear seat back. Refer to Section 01-10 .
   

Seat Back, Rear 60/40 Split Bench—Sedan
Removal

1. NOTE: Safety belt bolts do not secure seat back to vehicle.
   
   Remove rear seat cushion as described.
   

1. Fold down back seat and remove two bolts in the center of each seat back striker plates.
   

1. Remove two bolts from outboard rear seat back frame retaining brackets.
   

1. Lift seat back up and pull forward to remove from vehicle.
   

1. Remove panel (52018) and quarter trim panel (31012). Refer to Section 01-05 .
   

Trim Panel, Quarter—Sedan Removal

1. Remove rear seat. Refer to Section 01-10 .
   

1. Pull up on rear section of rear door scuff plate that overlaps lower quarter trim panel.
   

1. Pull lower quarter trim panel away from body.
   

1. Remove safety belt retaining bolt.
   

1. Feed safety belt through lower quarter trim panel.
   

1. Remove safety belt anchor plate-to-sill bolt from quarter panel.
   

1. Remove retractor anchor nut and retractor from rear quarter panel.
   

1. Remove upper seat belt anchor bolt and anchor from upper rear quarter panel.
   

1. Slide anchor plate end of safety belt through the openings in the quarter trim panel.
   

1. Remove outboard front safety belt retractor and tongue (611B08) from the vehicle.
   
   
   
   
   
   Item Part Number Description 1 386277-S190 Bolt (Part of 611B68) 2 31012 Upper Rear Quarter Trim Panel 3 611B60 Retractor and Tongue 4 N800937-S190 Nut 5 389370-S190 Bolt 6 — Rear Quarter Panel (Part of Body) 7 52018 Lower Rear Quarter Trim Panel 8 — Mounting Stud (Part of Body)

1. Remove seat belt anchor bolt and retractor and tongue from rear deck panel.
   
   
   
   
   

Installation

1. To install, reverse Removal procedure.
   

1. Make sure the safety belt webbing is not twisted. If it is, remove the twist.
   

1. Tighten retractor anchor bolt and safety belt anchor plate-to-sill bolt to 34-46 Nm (25-33 lb-ft).
   

1. Check the restraint system for proper operation.
   

I think you have to remove headrst bfore folding seat back down. You may have to unbolt seat from floor. 4 bolts.
Rear Seat Backrest —Split Bench Removal
NOTE: The 40% rear seat backrest must be removed before the 60% rear seat backrest.
40% rear seat backrest

1. Remove the 40% rear seat backrest.
   1. Remove the nuts and bolts.
   1. Remove the backrest.

60% rear seat backrest

1. Remove the 60% rear seat backrest.
   1. Remove the nut and bolt.
   1. Remove the backrest.

Installation
NOTE: The 60% rear seat backrest must be installed before the 40% rear seat backrest.
60% rear seat backrest

1. NOTE: Do not tighten the nut and bolt at this time.
   Install the 60% rear seat backrest.
   1. Install the rear seat backrest.
   1. Install the nut and bolt.

40% rear seat backrest

1. NOTE: Do not tighten the nuts and bolts at this time.
   Install the 40% rear seat backrest.
   1. Install the rear seat backrest.
   1. Install the nuts and bolts.

60/40% rear seat backrest

1. Tighten the 60/40% rear seat backrest nuts and bolts in the sequence shown.

40% Rear Seat Backrest

1. Tighten the 40% rear seat backrest nuts and bolts in the sequence shown.

please rate highly if this is what you need

Section 01-10: Seats and Tracks 1994 Mustang. Workshop Manual
REMOVAL AND INSTALLATION Seat Cushion, Rear Removal and Installation

1. Release pin from locks by pressing release button under rear seat cushion.

1. Pull rear safety belt and buckle (60044) through openings in rear seat cushion pad and frame (600A88) and remove rear seat cushion pad and frame .

1. To install, reverse Removal procedure.
   

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Section 01-10: Seats and Tracks 1994 Mustang. Workshop Manual
REMOVAL AND INSTALLATION Seat Back, Rear Sedan
Removal

1. Remove rear seat cushion as outlined.

1. Remove rear seat bolster. Refer to Section 01-05 .

1. Remove rear seat bolster mounting bolts. Remove bolster assembly.
2. Remove four seat back to package tray retaining bolts.

1. Remove seat back.

1. To install, reverse Removal procedure.

it is not designed to be removed. It is designed to slide back and forth as needed.

Section 01-10: Seats and Tracks 1998 Villager Workshop Manual
REMOVAL AND INSTALLATION Seat, Rear Bench
Removal

1. Remove the center seat(s) if equipped. Refer to the procedure in this section.
   

1. Slide the bench seat forward to the center row seating position.
   

1. Use a flat-blade screwdriver to remove the cover caps from the front of the rear seat cushion latch cover.
   
   
   
   
   

1. Remove the two rear seat bolts from the front of the rear seat cushion latch cover.
   
   
   
   
   

1. Lift the rear seat cushion floor cover on the back of the rear bench seat and remove the two inboard rear seat bolts and the two outboard rear seat bolts.
   
   
   
   
   

1. Remove the bench seat from the vehicle through the body side door opening.