Product Description
Custom Autosound USA-740 IN DASH AM/FM for BMW
There is just a single word for extravagant German vehicles. Honestly its three letters, “B-M-W” however we would prefer not to get excessively hung up on centralist points of interest. There is very little doubt that BMW is an untouchable producer of top notch cars. They've been doing it for quite a long time and they don't seem to be ceasing at any point in the near future. When you consider the very best in well built cars BMW often comes to mind, so the same sound quality has to measure up to the reputation. The smooth lines and mind blowing suspensions are just a few reasons why BMW has been raced on each track in North America and Europe. With even a modest sound system installed, it can be fully enjoyed due to the car’s tight body design, and quite highway drive. They made these cars virtually sound proof while driving in the lap of extravagance. Despite the fact that BMW had all the most recent technological advancements, the works of art dependably had their deficiencies.
Custom Autosound USA-740 Classic Car Radio With Bluetooth USA-740 Radio with Bluetooth Features:
- AM/FM Radio Bluetooth, USB & Auxiliary Inputs
- Option to Add CD-1, Single CD Player
- Bluetooth is Built Into the Radio
- Fits in your Original Dash Opening Without Cutting
- 3.5mm Aux Input on Front of Radio
- RCA Aux Input On Back
- Change Display Lettering Color
- Digital Tuner
- RDS Song/Artist Information
- 5 Channel RCA Pre-Outs w/ Subwoofer Control
- Separate Bass & Treble Control
- 5 EQ Presets
- Fader and Balance Control
- 15 FM & 10 AM Pre Sets
- Seek/Scan Function
- Back by a 2 Year Warranty from the Manufacturer
The interior of these cars made a statement all of their own with the radio taking center stage. However, although these classic cars were ahead of their time in terms of sound, those same car stereos are far outdated today. Installing a USA 740 Custom Autosound radio is the only way to go. These quality radios resemble a unique production line accompanied by your original automobile upgraded with today's electronics. Envision having the first processing plant look with CD changer accommodation, alongside speakers that fit in the factory space, giving you today’s sound quality. There isn't a great auto or truck that Custom Autosound doesn't cover. From the normal to the bizarre they have them all for you BMW model. Not just that, they have the best in business with regards to the reproductions.
There are few suppliers that can compete with Custom Autosound simply because they have been dominating this industry for many years. Much like the BMW brand, they are the pioneers in terms of classic car radios and will be for a long time to come. Best of all there will be no compelling reason to cut up your dash, these don't take any work other than catapulting them into your BMW dashboard. So order your classic radio to prepare your BMW for crystal clear tunes. Everyone adores reestablishing their fantasy auto from yesterday and the USA 740 will exceed your expectations.
Questions About the USA-740 IN DASH AM/FM for BMW
Do I need to modify the BMW dash to install it?
This listing is the version made for the BMW, designed to go into the original dash opening. Custom Autosound says its radios fit without altering or cutting the original dash.
What can I add to my USA-740 IN DASH AM/FM for BMW order?
You can add a front dual voice coil speaker, a rear 6x9 speaker pair (Custom Autosound 6x9 Speaker Pair and Upgraded Pioneer Speaker Pair), and an antenna (Hideaway Antenna and Power Antenna) right from the options above.
Why does the order ask about factory air?
Select Yes or No under Factory Air so we send the correct setup for your BMW's dash.
What can the USA-740 do?
Custom Autosound rates it at 300 watts peak, and it adds hi-volt 4-channel RCA pre-outs plus a subwoofer line-out. The USB port plays MP3, WMA, FLAC and WAV files from a flash drive.
Will it work with a 6-volt system?
Choose your system under Voltage (12 volt and 6 volt) and Ground (Negative and Positive) when you order.
What do I get with the USA-740 in my BMW?
There are two auxiliary inputs, a front mini jack and a rear RCA. The AM/FM RDS tuner holds 25 presets (15 FM, 10 AM) and can auto-store the strongest stations.
USA-740 specifications
- Bluetooth built in (streaming and hands-free calling)
- 300 watts peak power (45W x 4 RMS, 2-ohm stable)
- AM/FM stereo tuner
- 2 AUX inputs (3.5 mm front and RCA rear)
- USB port
- Direct control for optional CD-1
- 5-channel RCA pre-outs including subwoofer pre-out and control
- 15 FM and 10 AM presets
- 7-color LCD with dimmer; RDS station/song/artist display
- DSP EQ; auto-store presets
- Electronic tuning and volume; separate bass/treble; 4-way fader; L/R balance
- Power antenna lead; digital clock
- USA/EUR/JAP/RUS tuner capability (USA default)
- Custom Autosound 2-year manufacturer warranty
USA-740 wiring and tech tips
Use this as a head-unit reference for power, ground, antenna, speakers, and amplifier connections. Always match the printed diagram that ships with your unit if it differs.
Power and ground (typical Custom Autosound harness)
| Function | Wire color |
|---|---|
| Ignition / ACC +12V | Red |
| Battery / constant +12V | Yellow |
| Ground | Black |
| Power antenna | Blue |
Ignition and power-antenna leads are commonly fused at 1A on the harness—confirm against the guide that ships with your radio.
Speaker wiring (typical)
| Speaker | Wire color |
|---|---|
| Left front + / − | White / White-Black |
| Right front + / − | Gray / Gray-Black |
| Left rear + / − | Green / Green-Black |
| Right rear + / − | Violet (or Purple) / Violet-Black |
USA-740 extras
Expect antenna, USB, microphone (Bluetooth), CD-1, and subwoofer RCA connections in addition to front/rear line outs. Use the front 3.5 mm AUX or rear RCA AUX for wired sources.
Suggested order for a classic BMW
- Disconnect the vehicle battery before any wiring.
- Connect ground first, then constant (yellow) and ignition (red).
- Connect the antenna plug and the blue power-antenna lead if your car has a power antenna.
- Wire all four speakers, matching polarity.
- If using an amplifier, run RCA cables from the front/rear (and sub on USA-740/USA-850) pre-outs.
- Reconnect the battery and test radio, speakers, and charging system voltage.
Tech tips for classic BMW
- This radio is sold for the factory BMW opening used in classic models—do not cut a modern DIN rectangle if you want a stock look.
- A poor ground is the most common cause of whine or weak audio; scrape paint at the ground point and use a star washer.
- If AM reception is weak, check the antenna mast, cable continuity, and that the antenna plug is fully seated.
- Vintage Car Radio does not install radios. If you are not comfortable with 12V wiring, use a qualified installer.
USA-740 manuals
Download the manufacturer guide for operation, safety, and the official wiring diagram. You can also browse our full library on the Manuals page.
Vintage Car Radio does not offer installation. The manuals are for do-it-yourself reference or to share with your installer.
Two-Year Custom Autosound Warranty
All Custom Autosound radios sold by Vintage Car Radio are backed by a 2-year manufacturer warranty from Custom Autosound.
Radios are checked before shipping. If something is wrong out of the box or under warranty, call us at 844-802-4499 or 574-226-6676 and we will help coordinate with the manufacturer.
Vintage Car Radio does not offer installation services. Refer to the Manuals and Wiring / Tech Tips sections for manufacturer guidance, or use a qualified car-audio installer.
FAQ — classic BMW USA-740
Will this fit my classic BMW without cutting the dash?
It is built for the original radio opening used on classic BMW models. Compare your dash opening and bezel to the product photos. We do not modify dashes in-house.
Does this radio have Bluetooth?
Yes—Bluetooth is built into the USA-740 for streaming and hands-free calling.
Do I need an amplifier?
Many owners run speakers directly from the radio. Pre-outs are there if you want more volume or a subwoofer later.
Do you install the radio?
No. Vintage Car Radio ships the unit and documentation; installation is DIY or by a shop you choose.
What is the warranty?
Custom Autosound radios include a 2-year manufacturer warranty. See the Warranty section for details.
Need help?
Call 844-802-4499 or 574-226-6676.
Specs
Wiring / Tech Tips
Manuals
Warranty
Two-Year Custom Autosound Warranty
All Custom Autosound radios sold by Vintage Car Radio are backed by a 2-year manufacturer warranty from Custom Autosound.
Radios are checked before shipping. If something is wrong out of the box or under warranty, call us at 844-802-4499 or 574-226-6676 and we will help coordinate with the manufacturer.
Vintage Car Radio does not offer installation services. Refer to the Manuals and Wiring / Tech Tips sections for manufacturer guidance, or use a qualified car-audio installer.
