Prior to car #1501, CitiCars left the factory as 36 volt models; most had a 2.5 hp Baldor motor, but a few had the 3.5 hp GE motor.

In December 1974, CitiCar number #1501 (124SR1501) was the first factory-built 48 volt CitiCar.
These vehicles were designated as model SV-48, compared to the earlier SV-36.
All CitiCars made after this vehicle were produced as 48 volt models with the newer 3.5 hp GE series motor.
	
(Note - A number of the earlier SV-36 models were returned to the factory or to dealerships in order to upgrade to the 48 volt system.)

CitiCar #1751 (March 1975) saw a number of changes to the assembly line.
Here is a list of changes at car #1751 –
Dual master cylinder (was non-redundant single cylinder).

Electric defroster.
On earlier cars, the defroster -switch- was installed per federal regulations but not wired to anything.
A 'defogger' element was made available as a dealer option sometime in late 1974 and was normally connected to the otherwise inoperative defroster switch.

A self-canceling Lucas turn signal actuator was installed.
In previous vehicles it was a Signal Stat 900 non-self canceling type.

The turn signal switch change required a number of other changes –
Turn signal mounted high beam switch (was a floor mounted high beam switch).

Horn voltage decreased to 12v (put back to 18v at car 2584).

Horn switch moved to Lucas signal lever (was on center of steering wheel).

In addition, there were a number of technical improvements –
To improve ground reliability, the controller was grounded to the chassis at the right rear wheel well.

Dash switch for wipers replaced by one with improved quality.

Chassis ground wire: a larger diameter wire was installed.
The previous wire was too small (16ga) and would melt during battery charge.

Hot lamp wire color changed to yellow (was green).

After the changes at car #1751, there was a minor glitch noted in the service manual.
Since a lamp was removed from the instrument panel, there were fewer lamps, and the dimmer would not allow the lamps to go all the way off.
	
Before car #2011 (May 1975), the CitiCar had front disc brakes.
Cars #2011 and after had drum brakes.
	
On car #2080 (May 1975), the parking brake micro switch was moved to a different position, and was actuated by a plastic collar instead of a detent on the parking brake shaft.
	
On car #2211 (July 1975), a switch was added to the dual master cylinder along with a small PC board behind the dash to warn of problems with brake hydraulics, as well as indicating if the parking brake is engaged.
Before #2211, the brake lamp was a parking brake engaged indicator only.
	
Prior to car #2426 (September 1975) the accelerator was returned to off via a single accelerator spring.
Sebring-Vanguard issued a Service Note to modify all previous vehicles to add another spring.
After #2426, a dual spring accelerator pedal was standard.

Around December 1975 there was another major change in the CitiCar assembly line.
All CitiCars #2781 and higher were equipped with a 5.17:1 ratio Dana/Spicer rear axle and a 6 hp GE motor.
There was an optional 'hilly' Dana/Spicer axle with a higher 6.83:1 ratio also available for these cars which allowed better hill climbing performance, but at the cost of a slightly lower top speed.
These vehicles are also known as 'Transitional' Citicars.

Additional changes with car #2781 -	
Heater vents on side of car.

7" rear brake drums (now same as front).

Factory heat was standard on Dana axle vehicles.

The defroster switch was moved from the dashboard to the heater panel mounted below the dashboard.
The heater panel contained 2 knobs and 1 switch.
Prior to vehicle #2781, heat was a dealer-installed option, and used a two-knob panel.

On car #2842 (December 1975), a micro switch was added to the foot brake to prevent the accelerator from functioning when the brake was pressed.
	
On car #2854 (December 1975), the horn voltage was increased back to 18v.

CitiCar frame numbers are believed to start at 1001, and end around 3000.
To date, (May 2013) the lowest CitiCar frame number known to exist is #1040, and th
Prior to car #1501, CitiCars left the factory as 36 volt models; most had a 2.5 hp Baldor motor, but a few had the 3.5 hp GE motor.
In December 1974, CitiCar number #1501 (124SR1501) was the first factory-built 48 volt CitiCar. These vehicles were designated as model SV-48, compared to the earlier SV-36. All CitiCars made after this vehicle were produced as 48 volt models with the newer 3.5 hp GE series motor. 	
(Note - A number of the earlier SV-36 models were returned to the factory or to dealerships in order to upgrade to the 48 volt system.)
CitiCar #1751 (March 1975) saw a number of changes to the assembly line. Here is a list of changes at car #1751 –
Dual master cylinder (was non-redundant single cylinder).
Electric defroster. On earlier cars, the defroster -switch- was installed per federal regulations but not wired to anything. A 'defogger' element was made available as a dealer option sometime in late 1974 and was normally connected to the otherwise inoperative defroster switch.
A self-canceling Lucas turn signal actuator was installed. In previous vehicles it was a Signal Stat 900 non-self canceling type.
The turn signal switch change required a number of other changes –
Turn signal mounted high beam switch (was a floor mounted high beam switch).
Horn voltage decreased to 12v (put back to 18v at car 2584).
Horn switch moved to Lucas signal lever (was on center of steering wheel).
In addition, there were a number of technical improvements –
To improve ground reliability, the controller was grounded to the chassis at the right rear wheel well.
Dash switch for wipers replaced by one with improved quality.
Chassis ground wire: a larger diameter wire was installed. The previous wire was too small (16ga) and would melt during battery charge.
Hot lamp wire color changed to yellow (was green).
After the changes at car #1751, there was a minor glitch noted in the service manual. Since a lamp was removed from the instrument panel, there were fewer lamps, and the dimmer would not allow the lamps to go all the way off.	
Before car #2011 (May 1975), the CitiCar had front disc brakes. Cars #2011 and after had drum brakes.	
On car #2080 (May 1975), the parking brake micro switch was moved to a different position, and was actuated by a plastic collar instead of a detent on the parking brake shaft.	
On car #2211 (July 1975), a switch was added to the dual master cylinder along with a small PC board behind the dash to warn of problems with brake hydraulics, as well as indicating if the parking brake is engaged. Before #2211, the brake lamp was a parking brake engaged indicator only.	
Prior to car #2426 (September 1975) the accelerator was returned to off via a single accelerator spring. Sebring-Vanguard issued a Service Note to modify all previous vehicles to add another spring. After #2426, a dual spring accelerator pedal was standard.
Around December 1975 there was another major change in the CitiCar assembly line. All CitiCars #2781 and higher were equipped with a 5.17:1 ratio Dana/Spicer rear axle and a 6 hp GE motor. There was an optional 'hilly' Dana/Spicer axle with a higher 6.83:1 ratio also available for these cars which allowed better hill climbing performance, but at the cost of a slightly lower top speed. These vehicles are also known as 'Transitional' Citicars.
Additional changes with car #2781 -	
Heater vents on side of car.
7" rear brake drums (now same as front).
Factory heat was standard on Dana axle vehicles.
The defroster switch was moved from the dashboard to the heater panel mounted below the dashboard. The heater panel contained 2 knobs and 1 switch. Prior to vehicle #2781, heat was a dealer-installed option, and used a two-knob panel.
On car #2842 (December 1975), a micro switch was added to the foot brake to prevent the accelerator from functioning when the brake was pressed.	
On car #2854 (December 1975), the horn voltage was increased back to 18v.
CitiCar frame numbers are believed to start at 1001, and end around 3000. To date, (May 2013) the lowest CitiCar frame number known to exist is #1040, and th
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