Honda ABS Pump and VSA Modulator Repair
Summary: On a Honda the anti-lock brakes and the VSA stability system run through one unit, so a single failure lights both lamps. We repair that unit — the VSA modulator — at circuit level and return your own one, still carrying your car’s configuration.
Honda calls its stability system VSA, for Vehicle Stability Assist, and it shares hardware with the anti-lock brakes. That is why generic ABS advice sends Honda owners hunting for a part their car may not have. This hub sits inside our ABS pump and module repair work.
Why the ABS light and the VSA light come on together
VSA is Honda’s name for what most manufacturers call ESP — the electronic stability programme that brakes individual wheels to pull a car back into line. On a Honda it is not a separate box. Stability control and anti-lock braking share one hydraulic unit and the same four wheel-speed sensors, so a fault in either takes both offline and lights both lamps.
Two lamps is therefore one fault to find, not two, and the pairing on its own narrows nothing down — lamps that come on in pairs are the normal signature of a shared-hardware failure. The brakes still work. What is gone is the intervention that stops a wheel locking under hard braking and the one that catches a slide.
Why a generic code reader shows nothing on a Honda ABS fault
Honda does not store ABS and VSA faults as the P-codes a basic reader pulls off the emissions system. They sit in the VSA unit as Honda’s own two-part codes, and a reader that only covers emissions will report a clean scan on a car with a failed modulator.
Three come up repeatedly on Honda ABS work:
- 51-1, ABS pump motor failure, and 53-1, pump motor relay — the pair seen most often on the first-generation Jazz.
- 66-1, brake pressure sensor failure — behind the ABS and VSA lights on the 2002–2008 CR-V and the 2003–2008 Accord. That brake pressure sensor is built into the assembly rather than bolted to the outside, which is why a whole new unit is so often the recommendation.
A wheel-speed sensor fault gives the same two lamps and the same loss of both systems, so test the sensor and its signal before condemning the modulator. If the tool cannot reach the VSA unit at all, that is a no-communication fault — the break can be in the supply or wiring rather than the unit.
Nisshinbo on the Jazz, ATE on the CR-V: the supplier changes by model
There is no single Honda ABS unit. The first-generation Jazz assembly is commonly a Nisshinbo; the 2002–2008 CR-V and 2003–2008 Accord usually carry ATE (Teves) hardware; other Honda applications sit on Bosch platforms, including the Bosch 8.0 ABS/ESP module. The badge tells you nothing useful here — the labels on the unit do.
Reading the labels- Honda’s own number: begins 57110, then a three-character model code — 57110-S9A, 57110-TL0, 57110-TZB.
- The supplier’s number: a second label carrying ATE, Bosch or Nisshinbo’s own reference.
- Variants: one model and one build year can carry several 57110 numbers that look identical.
Photograph both labels before anything comes off — they tell us more than the model and year.
Three Honda units you can book in directly
If your Honda is not one of these three, send us the numbers off the label anyway — what is listed is what we see most.
Why sourcing a second-hand unit so often goes wrong
The obvious answer to a failed modulator is a used one from a breaker, and it is where Honda ABS repairs most often go wrong. One model and one build year can carry several 57110 variants that are physically alike, not interchangeable, and impossible to tell apart from the outside. Owners spend weeks chasing a number that never turns up.
Repairing the unit you already have removes the matching problem entirely. It is your own hardware, so there is nothing to cross-reference: it goes back carrying your Honda’s own configuration and in most cases needs no coding.
The failure is reproduced on in-house Hardware-in-the-Loop platforms that load the unit with simulated heat, vibration and load rather than testing it cold. The component that gave way is repaired at board level in an ESD-safe workshop, and the unit is programmed and calibrated with dealer-level tools before dispatch. Removing a modulator opens the brake hydraulics, so have the brakes bled properly on refit.
What Honda owners ask about the VSA light
Is the VSA light a different fault from the ABS light?
Usually not. Both systems run through the same unit and read the same wheel-speed sensors, so one failure lights both lamps.
My garage says there are no fault codes. Is that possible?
It is possible the tool never asked. Honda holds ABS and VSA faults in its own two-part codes, outside the emissions codes a basic reader shows. A scan that cannot reach the VSA system is not a clean scan.
Can I drive with the ABS and VSA lights on, and will it pass an MOT?
The car still stops, but with no anti-lock and no stability intervention — a hard stop or a wet corner behaves like an older car with neither. An illuminated anti-lock warning lamp is also an MOT failure item.
I have been offered a second-hand modulator. Is that a fix?
It is the same age and design as the one that failed, and it still has to be the right variant of several that look alike. Repairing your own removes both risks.
Sinspeed · VSA modulators repaired in-house
The number on the unit tells us more than the model year
Photograph the 57110 label, tell us what the car is doing and any codes read, and we will confirm what you have before anything comes off.
Programmed and calibrated with dealer-level tools before dispatch · Mail-in UK-wide — only the unit travels · Coverage extended to newer models through in-house R&D
