BMW 2002 Horn Replacement and Troubleshooting Guide (1966-1976)
If your classic BMW 2002's horn has gone quiet or sounds weak, this guide will help you diagnose the problem and choose the right replacement.
- Horn failure on a BMW 2002 is common and often caused by a bad ground, faulty relay, or corroded horn unit, not just a blown fuse.
- Before replacing the horn, test the relay and check for 12V power at the horn's connector when the button is pressed.
- Aftermarket brands like Standard Ignition offer a reliable, direct-fit replacement that balances quality and cost.
- Early models may have two horns (high and low tone); check your setup before ordering a replacement to ensure the correct sound and fitment.
Is Your BMW 2002 Horn Failing?
A non-working horn is a common issue on classic cars like the 1966-1976 BMW 2002. Due to its location behind the grille, the horn is exposed to rain and road debris, which can lead to corrosion and failure over time. The electrical system itself can also be a source of problems, from the horn button contacts in the steering wheel to the relay and fuse.
Common Symptoms of a Bad Horn
Diagnosing a horn problem on a 2002 is usually straightforward. Here’s what to look and listen for:
- No Sound at All: This is the most common symptom. It could be the horn itself, the fuse, relay, or wiring.
- Weak or "Sick Cow" Sound: If the horn sounds muffled or weak, it could be due to low voltage from a bad connection, corrosion, or the horn's internal diaphragm wearing out. Some original horns have an adjustment screw that can sometimes be used to restore the proper sound.
- Horn is Always On: This is a dangerous and annoying problem, often caused by a short circuit in the steering column or a faulty horn button contact that is constantly grounding the circuit.
- Horn Only Works Intermittently: A loose wire, dirty contacts in the steering wheel, or a failing relay can cause the horn to work one minute and not the next.
Check the Easy Stuff First
Before buying a new horn, check the fuse for the horn circuit. Also, listen for a 'click' from the horn relay (usually located in the engine bay near the brake fluid reservoir) when a friend presses the horn button. If the relay clicks but the horn doesn't sound, the problem is likely the horn itself or the wiring to it.
Choosing an Aftermarket Horn: Brand Quality
Since original OEM BMW horns for this era can be hard to find or expensive, aftermarket options are a popular and practical choice. For a classic like the 2002, you want a part that fits correctly and works reliably.
Standard Ignition (SMP):
Standard is a well-known aftermarket manufacturer. Their parts are generally considered a solid replacement for the original, offering a good balance of quality and price. They often produce horns in both high and low tones, allowing you to replicate the dual-tone setup if your car originally had it. Reviews for Standard horns are generally positive, citing good sound and quality construction.
Replacement Brand:
This is a generic or "white-box" brand. These parts are designed to be a direct-fit, budget-friendly option. While they will get the job done and restore function, they may not have the same longevity or precise tone as a brand-name part like Standard or an original Hella/Bosch unit. For a daily driver or a car that needs to pass a safety inspection, this is a viable choice.
High and Low Tones
Many European cars of this era, including early 2002s, used two horns with different pitches (a high tone and a low tone) to create a distinct, louder sound. When replacing, you can choose to install a single horn or buy both high and low-tone versions for a more authentic sound. Check if your car has wiring for one or two horns.
Cost of a New Aftermarket Horn (1966-1976 BMW 2002)
| Part Type | Cost Range |
|---|---|
| New Aftermarket Horn (e.g., Replacement, Standard Ignition) | $36.29 - $77.37 |
| Shop Labor for Installation | $60 - $120 |
Frequently Asked Questions
Where is the horn located on a BMW 2002?
The horn or horns are almost always located behind the front kidney grilles, mounted to the car's front support panel. They are exposed to the elements, which is a primary reason for failure.
Is replacing a BMW 2002 horn a difficult job?
No, it is a very easy job for a DIY mechanic. It typically involves removing the front grilles for access, unplugging one or two wires, and unbolting a single mounting bolt. Basic hand tools are all that's required. Always disconnect the battery before working on electrical components.
My horn doesn't work. Is it always the horn's fault?
No. In fact, problems are just as likely to be elsewhere in the circuit. The most common failure points are the fuse, the horn relay, the horn button contacts in the steering wheel, or corroded wiring and grounds. It's important to test the circuit before replacing parts unnecessarily.
Can I use a universal horn from an auto parts store?
Yes, you can, but it may require you to modify the wiring connectors or mounting bracket. Aftermarket horns from brands like Standard Ignition are often designed as direct-fit replacements, which makes installation much simpler.
Were there any recalls for the horn on the 1966-1976 BMW 2002?
Searches of the National Highway Traffic Safety Administration (NHTSA) database and other sources did not find any recalls or specific Technical Service Bulletins (TSBs) for the horn system on the 1966-1976 BMW 2002. Any issues today are typically due to the age of the components.
Technical Specifications
OEM Part Numbers: 61331371914 61331376189 61337163975
Voltage: 12V. Tone: High (510Hz) or Low (410Hz).
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.