NOx sensor cost · Free quote
NOx Sensor Replacement Cost: Parts From £249, Free Quote
Free quote · From £249 parts
A NOx sensor repair job with Bolt Remaps starts from £249 for parts. Labour is quoted after diagnosis, once live data confirms the sensor, not the wiring, has failed. Upstream and downstream sensors are both covered. Enquire first for a free, no-obligation quote by phone or WhatsApp. You commit only when you are happy, and the fixed total is agreed before any work starts.
Free quote. Enquire first, before you commit.
Tell us the reg, postcode and what the dash says. We give you a free, no-obligation quote by phone or WhatsApp before anything is booked. You only commit when you are happy with the price.
Enquire first
Call, WhatsApp or send the form with your reg, postcode and dash message.
Free quote
We tell you the diagnosis price and the likely parts cost before a van is booked.
You decide
No obligation. Book only if you are happy. The fixed total is confirmed after diagnosis, before any work starts.
Free quote: call 0203 038 8555 · WhatsApp 07719 156806 · Send the form
NOx sensor replacement price
Parts prices shown below. Labour charges are quoted on approach after diagnosis (POA). Fixed total price given before any work starts. No fix no fee on the agreed outcome.
- NOx sensor repair job (parts from): From £249 Upstream or downstream sensor. Parts only.
- Wiring or connector repair instead: Fixed price after diagnosis Many NOx codes are a chafed loom or corroded plug, not the sensor.
- Fitting labour: POA Quoted after diagnosis. Depends on sensor position and vehicle.
Signs your NOx sensor has failed
P20EE or P2BAD
The ECU thinks the SCR system is not cleaning the exhaust, often because the downstream sensor reads high.
P2200, P229F or U029D
Sensor circuit, range or lost communication faults.
AdBlue countdown started
A failed sensor is one of the most common causes of the countdown and no-start warning.
Fault returns after clearing
Codes clear, then come back within a drive.
Why we test before we replace
NOx sensors are often replaced on a guess. We read both sensors live, in parts per million, under load. A healthy sensor reacts to throttle within seconds. We also check the power supply and CAN wiring so you do not pay for a sensor when the fault is a connector.
Once the failed sensor is confirmed, you get the free quote: parts from £249 plus labour for your vehicle, as one fixed total.
Cost questions
How much does a NOx sensor replacement cost?
NOx sensor repair jobs start from £249 for parts. Labour is quoted after diagnosis, and you agree the fixed total before we start.
Upstream or downstream: which is it?
We read both live to confirm. On many vans the downstream sensor fails more often.
Is the quote free?
Yes. The enquiry and quote are free and carry no obligation.
Can a NOx sensor be cleaned?
No. A failed sensing element is replaced. Wiring and connector faults, though, can often be repaired.
Do you fit on site?
Yes. Mobile, 6am to 9pm, 7 days, including bank holidays, with a written warranty.