This trailer hitch + brake controller bundle is for: 04 - 08 Audi S4 Excluding convertible
- Trailer Hitch
- Trailer Hitch Hardware
- Trailer Hitch Installation Instructions
- Curt Assure Brake Controller
- Trailer Brake Controller Wiring Kit
- Trailer Brake Controller Pigtail Connector
- Ball Mount
- Trailer Ball
- Dual Output 4-way/7-way connector
- Wiring diagrams
- Circuit Breakers & Fuses
- Zip Ties
Trailer Hitch
However you define adventure -- whether it's climbing onto the back of a mountain bike, hunting from the top of a tree stand or camping with the family a long way from nowhere -- CURT class 1 hitches provide a light-duty towing receiver to help you Bring It. Each is made to fit a specific vehicle, providing easier installation, a better fit and optimal towing capacity. Custom class 1 trailer hitches are available for a variety of smaller vehicle types, including the compact car, crossover, minivan and small SUV. This particular class 1 hitch is designed to be a custom hitch for certain years of the Audi A4, A4 Allroad, A4 Quattro, A5 Quattro and A5 Sportback (to verify vehicle compatibility, see the CURT application guide at curtmfg.com). Tested in accordance with SAE J684, it offers a weight carrying capacity of 2,000 lbs. GTW and 200 lbs. TW. It is equipped with 1-1/4" receiver tube opening to accept a ball mount shank or other hitch mount. This class 1 hitch also comes with all necessary mounting hardware. With its lightweight design and smaller receiver tube size, a class 1 hitch is especially useful for adding cargo space with a hitch-mounted bike rack or cargo carrier. They can also typically be used to tow small trailers such as a utility trailer, kayak trailer or teardrop camper (never exceed the lowest weight capacity of any towing component; i.e. the vehicle, hitch, trailer, etc). Though CURT class 1 trailer hitches are only intended for light-duty towing, we apply the same principles of quality as we do to the rest of our rear mount hitches. Each class 1 hitch is made with hands-on engineering, high-strength steel and precise welding. We use a co-cured finish of liquid A-coat, inside and out, and durable black powder coat to provide a lasting defense against rust, chips and UV rays.
- Rated to 2,000 lbs. gross trailer weight and 200 lbs. tongue weight
- Engineered with a vehicle-specific design for a custom fit
- Concealed main body for OE look and seamless integration with the vehicle
- Tested for safety in accordance with SAE J684
- Precisely welded for superior strength and fit
- Protected by a durable high-gloss black powder coat finish
- Co-cured in a rust-resistant liquid A-coat, inside and out
- Equipped with an open-back receiver for easy cleaning
- Limited lifetime warranty (one-year finish, one-year parts)
- Made in USA (may include imported hardware)
Specifications
| Finish | GLOSS BLACK POWDER COAT |
| Main Body Shape | Square |
| Material | Carbon Steel |
| Mount Type Description | Blank |
| Receiver Tube Size | 1-1/4 IN |
| Side Application Type Description | Blank |
| Tongue Weight (TW) | 200 LB |
| Warranty | Limited Lifetime Warranty (One-Year Finish, One-Year Parts) |
| Weight Carrying Capacity (WC) | 2,000 LB |
Vehicle 4 Way Converter
Rain, road grime and salt can deal a vicious blow to your trailer wiring, and it takes electrical components with an extra-thick shell to stand up to the elements. The CURT multi-function electrical converter is an advanced taillight converter that offers the ultimate in vehicle compatibility and weather resistance, giving you a reliable wiring connection any season of the year. The potted design seals the internal electrical components in a watertight enclosure and is filled with a solid compound to protect against impacts, vibrations and moisture for long-lasting use, even on the exterior of the vehicle. The converter also features our advanced surface mount technology (SMT), using smaller components mounted directly to the surface of the circuit board. This produces lower resistance, reduced heat generation, longer life cycles and higher reliability. The CURT multi-function electrical converter comes with pigtail wires that are able to be spliced into two-wire, three-wire or PWM wiring system with combined stop and taillights. It converts any of these systems to a simple two-wire system, using a standard 4-way flat output, to be compatible with most trailer wiring. The converter is controlled using a microcontroller that is able to sense the current passing through it, allowing for quick reaction to dangerous conditions such as overload and short circuits. It also filters unwanted input signals to protect your wiring systems and uses a mere seven volts for low-voltage operation. The CURT multi-function taillight converter is a heavy-duty electrical converter for virtually any vehicle-trailer combination. It comes with color-coded wires and an easy-to-read wiring guide, as well as a dust cover to protect the 4-way flat connector. This package also includes four snap locks for faster, more secure splicing. A powered converter wiring kit #55152 is also required for installation.
- Converts 2-wire, 3-wire or PWM ST system to 2-wire trailer light wiring
- Potted enclosure significantly increases water and vibration resistance
- 4-way flat output connects tail lights, brake lights and turn signals
- Constructed with SMT circuitry for better performance and durability
- Microcontroller senses current to rapidly react to overload
- Provides improved overload, short-circuit and thermal protection
- Low-voltage operation allows function down to seven volts
- Color-coded wires with wiring guide for easier installation
- Snap locks included for fast, secure splicing
- Dust cover included to keep connector clean when not in use
Specifications
| Side Application Type Description | Blank |
| Warranty | One-Year Limited Warranty |
| Finish | N/A |
| Material | Blank |
| Mount Type Description | Blank |
| Output Type | 4-Way Flat |
Nall Mount w/ Ball
CURT towing starter kits are the all-in-one accessory package to accompany your trailer hitch, equipping you with the necessary components to hitch up and hit the road. Each towing starter kit includes a ball mount and a hitch pin or hitch lock, eliminating the need to purchase these items separately and removing the stress of needing to find components of matching size. This CURT towing starter kit features a class 2 ball mount #45521 with a 1-1/4" x 1-1/4" shank to fit a class 1 or 2 trailer hitch. CURT class 2 ball mounts are CNC-formed and robotically welded for clean, accurate weld lines. This class 2 features a powder coat finish and comes with a pre-torqued, chrome-plated 2" trailer ball. It offers a 3-1/4" drop, a gross trailer weight capacity of 3,500 lbs. and a tongue weight rating of 350 lbs. Also included in this towing starter kit is a CURT hitch pin & clip #21403. This hitch pin features a 1/2" diameter and is constructed from solid steel to ensure reliable strength. It also comes with a zinc finish and a grooved end that allows the clip to be inserted at any angle. All CURT 1/2" pins come with a 105-degree bend, making them easier to handle and operate when mounting your ball mount, and they will fit any CURT ball mount or hitch-mounted accessory with a 1-1/4" x 1-1/4" shank. For the new hitch owner and towing veteran alike, a CURT towing starter kit is the perfect accessory to Bring It.
- Rated to 3,500 lbs. gross trailer weight and 350 lbs. tongue weight
- Fits trailer hitches with a 1-1/4" x 1-1/4" receiver tube opening
- Factory-torqued trailer ball accepts 2" couplers
- USA-made ball mount is CNC-formed and robotically welded for a perfect fit
- 2-5/8" rise or 3-1/4" drop for precise trailer leveling
- 1/2" hitch pin fits any 1-1/4" x 1-1/4" receiver tube
- Grooved pin allows clip attachment at any angle
- Ball mount protected by a durable powder coat finish
- Trailer ball features a polished chrome-plated finish
- Limited lifetime warranty (one-year finish, one-year parts)
Specifications
| Side Application Type Description | Blank |
| Tongue Weight (TW) | 350 LB |
| Warranty | Limited Lifetime Warranty (One-Year Finish, One-Year Parts) |
| Drop | 3-1/4 IN |
| Finish | GLOSS BLACK POWDER COAT |
| Gross Trailer Weight (GTW) | 3,500 LB |
| Material | Blank |
| Mount Type Description | Blank |
ASSURE PROPORTIONAL TRAILER BRAKE CONTROLLER WITH DYNAMIC SCREEN
- Pressure-sensitive manual override button for precise braking power
- Large, high-quality 1-1/2" OLED screen displays full text readout
- Sleek, low-profile design with tactile buttons
- Triple-axis, motion-sensing accelerometer for highly responsive, smooth stops
- Third axis provides dynamic power adjustments when going up or down a hill
- Display can be tilted for different mounting options, above or below the dash
- Diagnostic alerts notify of potential problems like low voltage or disconnect
- Automatic leveling and calibration eliminate setup requirements
- Mounts at various angles, above or below the dash, to increase usability
- Nine levels of sensitivity adjustment for varying loads or driving conditions
- Auto sleep mode prevents battery drain
- Plug-and-play install with vehicle-specific quick plug harness (sold separately)
- Operates 2-8 trailer brakes at a time (1-4 axles)
- Built-in reverse-polarity and short-circuit protection
- Compatible with low-voltage systems, PWM systems, ABS and cruise control
Notes:
- Limited lifetime warranty
- Includes mounting hardware
TRAILER BRAKE CONTROLLER WIRING KIT
- For tow vehicles not equipped with factory tow package wiring
- Compatible with 2, 4, 6 or 8-brake systems (1-4 axles)
- Designed for use with CURT quick plugs #51515 or #51516
- Brake controller and trailer connector are not included
Notes:
- Includes 10 gauge duplex wire, 10 gauge cross-linked wire, 30-amp circuit breaker, ring terminals, butt connectors and cable ties
DUAL-OUTPUT ELECTRICAL ADAPTER (ADDS 7-WAY RV BLADE TO 4-WAY FLAT)
- Adapts a 4-way flat socket to fit 4-way flat and 7-way RV blade trailer plugs
- 4-way flat output connects tail lights, brake lights and turn signals
- 7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power
- Dust covers included to keep connectors clean when not in use
- Slit loom keeps wires contained and well protected
- Metal bracket securely mounts wiring to the vehicle or trailer hitch
UNIVERSAL TRAILER BRAKE CONTROLLER HARNESS WITH PIGTAILS
- Splices into a vehicle for a quick plug brake controller connection
- Compatible with any CURT brake control
- Wire colors match standard brake controller harnesses
- Includes 24" of 12 gauge wire for flexible installation
- Slit-loom sleeve keeps wires contained and protected
