I’ve got a 2010 is250 and I need to replace the windshield fluid reservoir, but I cannot find anything on how to replace it, any help would be appreciated.

REMOVAL

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL (for HID Headlight)
2. REMOVE COOL AIR INTAKE DUCT SEAL
3. REMOVE ENGINE ROOM SIDE COVER LH
4. REMOVE FRONT UPPER FENDER PROTECTOR LH
5. REMOVE RADIATOR GRILLE PROTECTOR
6. REMOVE FRONT BUMPER ASSEMBLY
7. REMOVE HEADLIGHT ASSEMBLY LH
8. REMOVE NO. 3 COOL AIR INTAKE DUCT SUB-ASSEMBLY

(a) Remove the 3 front fender liner LH screws.
(b) Disengage the engine under cover clip.
(c) Remove the 2 bolts, the screw, and the No. 3 cool air intake duct sub-assembly.
9. DRAIN WASHER FLUID

(a) Remove the washer hose from the windshield washer motor and pump assembly, and drain the washer fluid.
10. REMOVE WINDSHIELD WASHER JAR AND PUMP ASSEMBLY (w/o Headlight Cleaner System)

(a) Disconnect the 2 connectors.

(b) Remove the bolt.
(c) Pull the upper part of the washer jar and pump upward to remove it from the windshield washer jar and pump assembly.

(d) Remove the 3 bolts and the windshield washer jar and pump assembly.

You might try a couple of Auto Body Shops for this; they are well versed in disassembling (and reassembling!) these body parts and might knock this out for you quicker and cheaper than a Dealership or customary repair shop.

You’re a life saver, thank you!