Tires
I have one tire that needs replacing on an awd legacy 2003. Can i just do the one or do i need all 4 ?

Just to keep you on your toes, the 2003 Subaru Legacy shuffles its trim offerings up a little bit this year, adding on some performance refinements and more standard features on its base model sedans and wagons. Last year's GT Limited becomes the 2.5GT. Last year's GT is now the L Special Edition. And last year's L is, well, the L. All three trims are available as a sedan or wagon and are powered by the 165-hp 2.5-liter H4 engine. A 5-speed manual is standard, and 4-speed auto tran optional. For the 2.5GT, the 4-speed comes with a Sportshift mode, in keeping with the bigger brakes, limited slip differential, and sport suspension offered in this trim. Short-range gearing also provides a more responsive performance in the GT versus the L trims.
The base L sedan and wagon adds a CD player and remote entry to its power features and cruise control. The new L Special Edition is a lot like the old GT. It comes with larger 16-inch tires, a sunroof, wood accents, foglights, and a leather-wrapped wheel and shifter. If you want leather seats and a new 8-way power driver's seat, you want the 2.5GT, which also gets a Momo steering wheel, a 6-CD player, and heated seats and mirrors. All of the 2003 Legacy lineup feature ABS brakes and dual front airbags, and the full-time AWD that has made Subaru such a reliable and trusted name in northern climates. Though the Legacy isn't quite as rugged or out-door oriented as its Outback sibling, it is a good family car that gets four stars and top ratings on crash tests. The wagon is a bigger seller probably because of its storage versatility (up to 68 cubic feet).
Aside from the AWD, drivers love the 2003 Legacy's handling. The horizontal boxer 4 engine sits lower, dropping the center of gravity and making the car a more stable performer. Though gas mileage is an average 21/27 mpg, it's still better than comparably-sized SUVs. Compared to the V6 Outback, the 2003 Legacy feels underpowered, and owners say the seats are uncomfortable for long rides. Overall legroom is limited, and some owners have had problems with the clutch.
I have one tire that needs replacing on an awd legacy 2003. Can i just do the one or do i need all 4 ?
Car failed smog test it gave a p0732 as a trouble code what could be the cause of that.
Bought a Boss audio system for my legacy, but did not purchase the aftermarket wiring harnesses. I thought I could just hard wire it in. All was successful EXCEPT for the blue wire coming off the radio marked "power antenna." Called the tech line, and they said you have to bypass the amplifier by hooking it to some wire that I now forget. Anyone got any ideas?
I found the timing belt being ripped apart by the first idler. I replaced the belt but the same thing happen again. Could this be because of the bad idler or poor quality timing belt?
Airbags
Dual front airbags
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel
Convenience Features
Multi-function remote: keyless entry · Steering wheel: tilt-adjustable
Drivetrain
Limited slip differential: center
Lights
Exterior entry lights: security approach lamps
Mirrors
Exterior mirrors: power · Inside rearview mirror: electrochromic
Rear Seats
Type: bench
Seats
Front seat type: bucket · Upholstery: cloth
Tires and Rims
Wheels: alloy
Windows
Front wipers: intermittent
Airbags
Dual front airbags
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel
Comfort Features
Shift knob trim: leather · Steering wheel trim: leather
Convenience Features
Multi-function remote: keyless entry · Steering wheel: tilt-adjustable
Drivetrain
Limited slip differential: center
Lights
Exterior entry lights: security approach lamps
Mirrors
Exterior mirrors: power · Inside rearview mirror: electrochromic
Rear Seats
Type: bench
Roof
Moonroof: power
Seats
Front seat type: bucket · Upholstery: cloth
Tires and Rims
Wheel type: aluminum alloy
Windows
Front wipers: intermittent
Airbags
Dual front airbags
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel
Convenience Features
Multi-function remote: keyless entry · Steering wheel: tilt-adjustable
Drivetrain
Limited slip differential: center
Lights
Exterior entry lights: security approach lamps
Mirrors
Exterior mirrors: power · Inside rearview mirror: electrochromic
Rear Seats
Type: split-bench
Roof
Roof rack color: black
Seats
Front seat type: bucket · Upholstery: cloth
Tires and Rims
Wheels: alloy
Windows
Front wipers: intermittent
Airbags
Dual front airbags
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel
Comfort Features
Shift knob trim: leather · Steering wheel trim: leather
Convenience Features
Multi-function remote: keyless entry · Steering wheel: tilt-adjustable
Drivetrain
Limited slip differential: center
Lights
Exterior entry lights: security approach lamps
Mirrors
Exterior mirrors: power · Inside rearview mirror: electrochromic
Rear Seats
Type: split-bench
Roof
Moonroof: power · Roof rack color: black
Seats
Front seat type: bucket · Upholstery: cloth
Tires and Rims
Wheel type: aluminum alloy
Windows
Front wipers: intermittent
Airbags
Dual front airbags · Front side airbags
Audio System
6 disc in-dash CD · MP3 player: CD MP3 Playback · AM/FM radio
Brakes
ABS: 4-wheel
Comfort Features
Shift knob trim: leather · Steering wheel trim: leather
Convenience Features
Multi-function remote: trunk release · Steering wheel: tilt-adjustable
Drivetrain
Limited slip differential: rear
Lights
Exterior entry lights: security approach lamps
Mirrors
Exterior mirrors: power · Inside rearview mirror: electrochromic
Rear Seats
Type: bench
Roof
Moonroof: power
Seats
Front seat type: bucket · Upholstery: leather
Tires and Rims
Wheel type: aluminum alloy
Windows
Front wipers: intermittent
Airbags
Dual front airbags · Front side airbags
Audio System
6 disc in-dash CD · MP3 player: CD MP3 Playback · AM/FM radio
Brakes
ABS: 4-wheel
Comfort Features
Shift knob trim: leather · Steering wheel trim: leather
Convenience Features
Multi-function remote: keyless entry · Steering wheel: tilt-adjustable
Drivetrain
Limited slip differential: center
Lights
Exterior entry lights: security approach lamps
Mirrors
Exterior mirrors: power · Inside rearview mirror: electrochromic
Rear Seats
Type: split-bench
Roof
Moonroof: dual power · Roof rack color: black
Seats
Front seat type: bucket · Upholstery: leather
Tires and Rims
Wheel type: aluminum alloy
Windows
Front wipers: intermittent