What This Switch Is and What It Fits
This is the rotary knob switch mounted in the dash bezel on Volvo VNL and VNM trucks. It controls the main lighting circuit - parking lights, low beams, and on most trucks the panel/gauge dimmer function runs off the same shaft. Volvo used this same switch design across a long production run, which is why one part number covers 2004 through 2023 model years.
Volvo's own numbering shows some drift over the years - you'll see 20942844 and 20953575 both referenced depending on which parts catalog or dealer counter you're talking to. They're the same switch, just different points in Volvo's part numbering history as they've reissued or updated the casting.
If your old switch is cracked, the knob won't stay in detent, or the dash lights flicker when you wiggle it, that's your dash telling you the switch itself has failed, not just a bulb or fuse issue.
Why These Cross Numbers Match Up
The cross-reference numbers listed - 4313089, 901-0006, 577.96506, S-29361 - are all aftermarket or supplier part numbers that different manufacturers stamp on what is mechanically the same switch assembly. Same connector pattern, same shaft and detent positions, same mounting flange to the dash bezel.
Where these switches can trip you up is the connector pinout and the number of detent positions. Volvo changed wiring harness configurations slightly between earlier VNL/VNM trucks and the newer body style trucks, so a switch that bolts in physically doesn't always mean every circuit lines up the same way. Check the connector housing shape and pin count against your old switch before you assume it's a straight swap.
Rule of thumb here: pull the failed switch, read the number stamped on the back or side of the housing, and match it against what you're ordering. If the number's worn off, VIN lookup through your Volvo dealer or our counter will get you the right part.
Ordering From PartStop
We stock this switch at our Tacoma location for same-day pickup if you're local, and we ship nationwide for fleets that need it delivered to the yard or a driver stuck at a truck stop with a dead headlight circuit.
Every switch we sell carries a 6+ month warranty. This is a direct replacement in form and function, not a knockoff - but Volvo cab wiring and switch positions do vary by build date and options package, so confirm fitment against your VIN or the old part number before you order, especially if your VNL is a newer body style with the redesigned dash.
20953575 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to 20953575. Use them to identify the part — then confirm the exact fit by VIN or the number stamped on your old unit before you order. An interchange is a starting point, not a fitment guarantee.
| Brand / Line | Cross-Reference Numbers |
|---|---|
| Cross-Reference | 4313089, 901-0006, 577.96506, S-29361 |
Frequently asked questions
Does 20953575 fit my 2015 VNL 670?
Likely yes - this switch covers VNL/VNM trucks 2004-2023, and the 2015 670 falls in that range. But dash switch wiring can vary by option package, so check the number stamped on your old switch or give us your VIN and we'll confirm before you order.
Is this the same as the S-29361 switch?
Same switch, different supplier stamping it with their own part number for their catalog. Mechanically it's the identical headlight switch assembly - connector, shaft, and mounting all match.
My headlights work but the dash dimmer doesn't - is that this switch?
Could be. On these trucks the dimmer function usually runs through the same switch as the headlight control. If the knob feels loose or won't hold a dimmer position, that's a strong sign the switch itself is worn out internally, not a separate dimmer module.
Not sure it fits? We check before you pay.
Run your VIN and we’ll match parts to your exact truck, or call the counter — a person who knows trucks verifies fitment by OEM number before the order ships. No wrong-box returns.
More cross-reference guides
Need the part, not just the reading?
Every part below is a Premium Quality aftermarket Direct Replacement with published OEM cross-reference numbers, a 6+ month warranty and same-business-day shipping from Tacoma, WA. Not sure it fits? Run your VIN — or call and a person who knows trucks will verify fitment before you pay.