BMW 735i (E32) Brake Light Switch: A Comprehensive Guide (1985-1992)
Fix common brake light problems, restore cruise control, and clear dashboard warnings on your E32 7-Series by understanding and replacing this critical part.
- A faulty brake light switch is a critical safety issue and should be replaced immediately.
- Symptoms include non-working or stuck-on brake lights, cruise control failure, and a 'Brake Light Circuit' warning.
- Verify if your car needs a 2-pin or 4-pin switch before purchasing a replacement.
- Replacement is simple for a DIYer and requires removing the lower dash panel for access.
Is Your BMW 735i Brake Light Switch Failing?
A failing brake light switch on the E32 7-Series can cause confusing symptoms. The most obvious sign is your brake lights not working, which is a major safety hazard. However, the switch can also fail in the 'on' position, leaving your brake lights constantly illuminated and draining your battery. Because this switch is tied into other vehicle systems, you might also experience problems like the cruise control not engaging or suddenly cutting out. On some BMWs, a faulty switch can even cause an ABS warning light to appear on your dashboard or trigger a 'BRAKE LIGHT CIRCUIT' error message 🎬 Watch this guide on symptoms and fixes for bad switches. on the check control panel.
A Critical Safety Check
Driving with malfunctioning brake lights is illegal and extremely dangerous. If you suspect your brake light switch has failed, it's crucial to diagnose and replace it immediately to avoid a potential rear-end collision.
Choosing the Right Aftermarket Brake Light Switch
For a part like the brake light switch, you don't necessarily need to buy a Genuine BMW part to get good results. Several reputable aftermarket brands offer quality replacements that provide excellent value. However, quality can vary, so it's wise to choose a trusted brand.
Based on owner feedback and brand reputation for German vehicles, here is a general quality assessment for available aftermarket brands:
- Top Tier (OEM-Quality): Brands like Hella and Vemo are often original equipment manufacturers or suppliers for BMW and other German automakers. Choosing one of these brands is the closest you can get to the original part's quality and reliability.
- Reliable Aftermarket: Standard Ignition (Standard Motor Products) is a well-respected brand in the North American market known for producing durable and reliable electronic components that meet or exceed OE specifications. Facet is another established European brand offering dependable parts.
- Budget-Friendly: URO Parts offers a more affordable option. While some of their standard parts have had mixed reviews in the past, they are a viable budget choice. If available, their 'URO Premium' line offers improved quality and a longer warranty.
Pro Tip: Check Your Pins
The brake light switch for the E32 735i came in both 2-pin and 4-pin versions. Before ordering, it is essential to visually inspect the switch currently on your vehicle to ensure you purchase the correct replacement. The 4-pin version is most common for the 1988-1992 model years.
Brake Light Switch Replacement Cost (1985-1992 BMW 735i)
The cost to replace the brake light switch is very reasonable, especially if you do the work yourself. The part itself is inexpensive, and labor is minimal.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Part | $18.96 - $50.41 |
| Shop Labor | $60 - $120 |
| Total Professional Replacement | $79 - $171 |
Frequently Asked Questions (FAQ)
Can I replace the brake light switch myself?
Yes, this is a very DIY-friendly job. The switch is located above the brake pedal and is typically held in by a clip or bracket. The process involves removing the lower dash trim panel for access, disconnecting the electrical connector, and swapping the old switch for the new one. No special tools are required, though working in the footwell can be awkward.
🎬 See how to replace the brake light switch on your E32.What happens if I don't replace a faulty brake light switch?
Ignoring a bad brake light switch is a serious safety risk. You could be driving with no brake lights, or with them stuck on, both of which can easily lead to an accident. It can also cause annoying electrical issues like non-functional cruise control and persistent dashboard warning lights.
How do I know it's the switch and not the bulbs or a fuse?
If all of your brake lights stop working at once, the switch or a fuse is a more likely culprit than all the bulbs failing simultaneously. First, check the brake light fuse. If the fuse is good, and the lights are either stuck on or not working at all, the switch is the next logical part to test and replace.
Are there any recalls for the E32 735i brake light switch?
Searches for the 1985-1992 735i did not show any specific open recalls for the brake light switch on the NHTSA database. There was a recall for later model year BMWs in 2000 for a similar issue, but it does not apply to this generation. More recent brake-related recalls for BMW do not involve the brake light switch on these older models.
Helpful Videos
Technical Specifications
OEM Part Numbers: 61318360417 61311382385
Located on the brake pedal bracket. Available in 2-pin and 4-pin configurations.
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.
- BMW 735i: