I have a 2005 Roadster, what service should be done at the 20 year and 23,000 mile point, Change complete brake system? trans fluid change? any suggestions, I dont have many service records.

 

I'd do what I do at 5-7 years for the Crossfire and Truck:

Coolant flush
Brake Bleed
Clutch Bleed
Transmission fluid (and filter in automatics)
Differential fluid

I also replace batteries at 48 month intervals and in the case of the Crossfire, put in the redundant engine block ground as described by James here (do NOT do my mod, I no longer endorse it):
https://www.crossfireforum.org/forum...le-engine.html

Our cars have no lube points for the flex discs and I understand that our front wheel bearings are sealed, you simply replace the entire hub assembly in case of leaks, noises or any other indication that the bearings are shot.

 

If your brake hoses are original, I would replace them.
LINK Rear Brake hose replacement

LINK Front Brake hose replacement

 

If the sticky key issue has not been fixed search here on the forums and Youtube for instructions and videos for any work to be done . I would inspect the brakes, change hoses ( optional) , bleed wheel cylinders & completely replace all the brake fluid. Stop Tech Braided Stainless brake hose available at Amazon : part # front 950.35001 rear 950.35500
also replace new RCM module ( very easy to replace ) and crankshaft sensor as preventive maintenance both available here , stick with Bosch part for crankshaft sensor : https://www.autohausaz.com/pn/MB-1705450305

 

The Double Wrench Service should be done in addition to any of the above recommendations.

Double Wrench Service

Change engine oil, engine oil filter and rotate tires.
Replace dust filter
Lubricate hood hinges, latch and secondary latch.
Reset FSS Display
Check horn, hazard warning flashers, turn signals, indicator lamps, exterior lighting and headlamps (adjust headlight aim, if necessary)
Check windshield wipers and washer system. Replace wiper blades if necessary.
Check seat belts for damage and proper function.
Check hydraulic brakes and parking brake function.
Check fluid levels for hydraulic brake system, power steering system, windshield wiper system and engine cooling system (check corrosion inhibitor/antifreeze).
Inspect front and rear brake pads for lining thickness
Inspect tires for damage, general condition and inflation pressure. Correct if necessary.
Inspect major underbody and underhood components for leakage or damage. (If leakage is found, determine cause and repair)
Inspect condition of front axle ball joints and rubber boots.
Inspect condition of steering components and rubber boots.
Inspect condition of accessory drive belt.
Inspect body for paint damage (every 2 years)
Check chassis and supporting body parts for damage and corrosion (every 2 years)
Retighten steering locking bolts (50,000 miles or 4 years)
Check condition of driveshaft flex discs (50,000 miles or 4 years)
Replace fuel filter and air cleaner filter element (60,000 miles or 4 years)
Change the automatic transmission fluid and filter (80,000 miles). After this changes it is filled for life. Manual transmission comes filled for life from factory.
Replace spark plugs. (100,000 miles or 5 years)
Replace engine coolant using extended life coolant (100,000 miles or 5 years).

 

I endorse everything said after my post!