Seatbelt light / chime

[9kracing]

I'd like to put 4-point harnesses in my car and remove my factory seatbelts.

Is there a way to make it so there won't be a light on the dash or a chime?

I've done some research, and the threads I can find are either unanswered, or old.

I assume it can be done through bimmercode?

[moproblems]

I just have no chime (my car came that way) and live with the light when I have the 6 point on.

[Sharocks]

I don't think any of my cars chime if I don't have my belt on but I don't do that much if ever so IDK.

The light can be coded out for sure probably.

[Obioban]

My 6 point clips into my factory receiver, so I can keep the pretensioner functionality with my harness.

And it prevents lights. And it lets me keep the 3 point for street use. And lets the belt move with the seat, keeping it properly located regardless of seat position.

[Cubieman]

If you dont code it you can always get a spare buckle or one of the cheapo amazon ones.

[prostcfc]

I used NCS Expert

[9kracing]

I used NCS Expert

So it can be done then.

Got any instructions?

[prostcfc]

So it can be done then.

Got any instructions?

It was over a year ago and I haven't been back in NCS Expert since. But there are lots of instructions floating around with how to use it. Trick is finding which settings turn off what you want. Here's a thread I responded to with some findings:

https://nam3forum.com/forums/forum/special-interests/coding-tuning/286091-ncs-expert-code-out-steering-wheel-airbag-srs-light

[bigjae46]

Just so you know...many DE orgs and tracks don't allow 4pt harnesses. There are reasons for that. You will never get a 4pt lap belt tight enough without assistance to prevent submarining. Most of all is an increase in the risk of a basal skull fracture = usually instant death if you do get the lap belts tight enough. The shoulder belts hold the torso upright against the seat so your head experiences all of the acceleration forces. It is HIGHLY recommended if not mandated to wear a HANS device with any harness. This is worse in a fixed back seat because your head will slam back into the seat. Rollovers...better hope the belts start to loosen. In testing, your head will see forces of over 20g's multiple times.

The Schroth quick fit pro is the exception because it has an anti-submarine system that is DOT tested and webbing that allows the upper torso to slightly rotate. The only 4pt harness I would recommend for street use without a helmet and HANS is the quick fit pro which I don't think is being considered because the seat belt warning question wouldn't come up.

Not criticizing, just informing.

[Obioban]

Just so you know...many DE orgs and tracks don't allow 4pt harnesses. There are reasons for that. You will never get a 4pt lap belt tight enough without assistance to prevent submarining. Most of all is an increase in the risk of a basal skull fracture = usually instant death if you do get the lap belts tight enough. The shoulder belts hold the torso upright against the seat so your head experiences all of the acceleration forces. It is HIGHLY recommended if not mandated to wear a HANS device with any harness. This is worse in a fixed back seat because your head will slam back into the seat. Rollovers...better hope the belts start to loosen. In testing, your head will see forces of over 20g's multiple times.

The Schroth quick fit pro is the exception because it has an anti-submarine system that is DOT tested and webbing that allows the upper torso to slightly rotate. The only 4pt harness I would recommend for street use without a helmet and HANS is the quick fit pro which I don't think is being considered because the seat belt warning question wouldn't come up.

Not criticizing, just informing.

They also make the 4 point profi 2 ASM with the same anti submarine system as the quick fit pro:
https://competitionmotorsport.com/products/schroth-profi-ii-asm-harness-4-point?utm_source=google&utm_medium=cpc&utm_campaig n=dynamic_search&gad_source=1&gad_campaignid=18082 920925&gbraid=0AAAAADp5hZlSm-6aiAjA5FXCBvUM4GjLg&gclid=Cj0KCQjwjb3SBhDgARIsAMKi Wzjh66gPRrwxDuHOvx6rmslTe-mPFLHB8_3JzIOH6wgMO8cUjvJOq1waAiBvEALw_wcB

Works with and without sub strap, and works with HANS device.

That's actually what I use. Going the the gas station or doing parade laps at track event, it's nice to not have to sub strap up to not die.

[9kracing]

Thank you sir.

I was informed my half-cage is a death trap as well.

#yolo




Just for fun I asked ChatGPT which is by NO means an authority, and should be taken with a large grain of salt -



My read for your exact setup


For Speed Ventures / casual Buttonwillow, Willow Springs, Chuckwalla-type days:
Likely yes, assuming clean install. Their tech form explicitly has boxes for OEM 3-point, 5/6-point, and 4-point, but says all 4-point systems must pass tech at the event.

For NASA HPDE / TT:
Likely yes if the FIA label is visible and current. NASA’s HPDE/TT rule says the only 4-point belt systems allowed are ones carrying FIA B-xxx.T/98 or newer certification, or certain FMVSS 209 vehicle-specific belts; DOT-only 4-points are prohibited. NASA also says non-factory harnesses must conform to its driver-restraint rules, and FIA belts cannot be used past the expiration year shown on the label for competition use.

For BMW CCA HPDE:
Probably yes from a seat-layout perspective because your Recaro CS has dual shoulder pass-throughs. BMW CCA says lap/shoulder belts are required, equal restraints are required for driver/passenger, and multipoint belts may be used with seats that have harness pass-throughs when installed per the belt manufacturer’s instructions. Individual chapters can still be stricter, so I’d check the MotorsportReg page for the exact event.

For SCCA Time Trials:
Maybe for Safety Level 1, but not enough for Safety Level 2. SCCA Safety Level 1 requires at least 3 mounting points and says SFI/FIA-rated belts are recommended; aftermarket harnesses must be inspected by an SCCA tech inspector. But SCCA Safety Level 2 generally calls for a 5-point racing harness, so your 4-point Willans would not satisfy that level.

For HOD / Hooked on Driving:
Likely okay for HPDE, but they call out restraint matching for passengers and they strongly recommend a head-and-neck restraint with a 4-point system. Their mandatory HNR requirement is specifically for cars using 5- or 6-point harnesses.

[Obioban]

Unless you're a child, the CS's harness holes can't be used safely with a 4 point. They're so low your spine will get crushed.
(belts should go backwards off your shoulders-- not down)

[9kracing]

Hrmmm... I will have to look into that.

I'm 6'2"


Thanks.

[bigjae46]

Thank you sir.

I was informed my half-cage is a death trap as well.

#yolo

I disagree with that to an extent. With stock seats which include a head rest, I don't see how you'd instantly smack your skull off the roll bar. I'd be less worried about that than a 4pt harness. A racing bucket will flex but shouldn't come into contact with the roll bar. It may pose a different risk if you're really tall. A half cage does less than you think. Most injuries and death in rollovers are caused by body parts (arms) or head coming into contact with the ground or a hard interior surface. This risk increases substantially with each subsequent rotation. Most rollover deaths according to NHTSA was the occupant's head hitting the ground when the side of the car landed.

Anything safety modified from stock is a tradeoff...just like 99.99% of mods. I'm not saying 4pt harnesses will result in death.

As part of the community, I would like my forum mates to be informed so they can make their own informed decision. I think there is a better way to do it - Schroth quick fit pros - but that is my opinion.

[9kracing]

I think there is a better way to do it - Schroth quick fit pros - but that is my opinion.

Your opinion is valid, and I don't disagree... although I'm not able to find any third party testing, or verification that Schroth's ASM actually works other than Schroth saying it does.

But I digress... my car is a show car 99% of the time. It gets loaded onto and off of tow trucks, and once in a blue moon we take it out for a sunny Saturday drive.

If I was doing any sort of serious motorsports I'd definitely rethink the setup I have.