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Car remapping · Maidstone, Kent · mobile · nationwide dealers
Car remapping explained, priced, and measured on our own dyno
A remap rewrites the software that decides how your engine performs. Done properly it is the biggest gain per pound on any turbocharged car, it is reversible, and it takes an afternoon. Put your registration in and see what your exact engine makes now, what it will make, and what it costs.
Stage 1 same day · original file kept · every figure from our own rolling road · 28,500+ cars tuned
What it is
What car remapping actually does
Your engine control unit runs a map: tables of fuel, boost and ignition timing for every load and speed. The factory writes one map for the whole world, every fuel quality, every driver and every service history, so it leaves a margin. Remapping reads that file out through the diagnostic socket, recalibrates it for your engine, and writes it back. No parts, no cutting, and the original is kept.
More power and torque
Typically 15 to 30 percent more on a turbo petrol, often more on a diesel. The car pulls harder from lower revs, overtakes shorter, and tows easier.
Sharper throttle
The lazy first inch of pedal travel the factory builds in goes. The car responds when you ask, not a moment later.
Economy, driven the same
Diesels in particular often use less fuel after a remap when driven normally, because the torque is there without the pedal being buried.
Reversible
Your original file is kept. It goes back on for a sale or a warranty visit.
Real figures
What a Stage 1 remap does on cars we have tuned
Six rows from our own vehicle database, the same rows the calculator quotes from. Standard against Stage 1 software only, no parts, measured on the JFA rolling road.
| Car | Standard bhp | Remapped bhp | Standard Nm | Remapped Nm | Gain |
|---|---|---|---|---|---|
| VW Golf R 2.0 TSI | 320 | 420 | 420 | 500 | +31% |
| BMW M3 Competition | 510 | 600 | 650 | 760 | +18% |
| Audi RS6 4.0 TFSI | 600 | 700 | 800 | 950 | +17% |
| Toyota GR Yaris 1.6T | 261 | 305 | 360 | 400 | +17% |
| Abarth 595 1.4 T-Jet | 145 | 170 | 210 | 290 | +17% |
| Ford Transit Custom 2.0 | 130 | 190 | 385 | 480 | +46% |
Your car is in the same database. Put the reg in and the calculator shows the figures and the price for your exact engine.
Stages
Stage 1, 2 or 3?
Stage 1 is software on a standard car. Stage 2 is software plus the parts that let the engine breathe. Stage 3 is a build. Most people want Stage 1 and that is where to start.
Stage 1, 2 and 3 explained
What changes on the car at each stage, how long it takes, what it costs and whether it goes back.
Read the guide →Remap calculator
Your registration, your engine, all three stages priced with the parts each one needs.
Price my car →Gearbox remapping
DSG, DCT and ZF calibration to match the engine file: faster shifts, higher limits, launch control.
Gearbox tuning →Rolling road
Where every figure on this page comes from. Sessions from £150, before and after printouts.
See the dyno →By make
Remapping by manufacturer
Every make links to its models and engines, with the standard and remapped figures for each.
BMW remappingAudi remappingVolkswagen remappingMercedes remappingFord remappingSEAT remappingVauxhall remappingVolvo remappingRenault remappingMini remappingPeugeot remappingSkoda remappingPorsche remappingCitroen remappingFiat remappingAlfa Romeo remappingLand Rover remappingNissan remappingHyundai remappingKia remappingToyota remappingJaguar remappingMazda remappingJeep remappingHonda remappingAbarth remapping
Not listed? Browse every vehicle or put the reg in above.
Where
Remapping near you
Four ways to get a JFA remap, depending on where you are and what the car needs.
1
Maidstone, Kent
The workshop
Unit 31, Parkwood Industrial Estate. Stage 1 while you wait, Stage 2 and 3 on our own AWD rolling road. Directions and hours.
2
Mobile remapping
Kent and the South East
We come to your home or work for Stage 1 on most cars. Mobile tuning service.
3
Home tuning tool
Posted to you
For some cars a plug-in tool lets you switch between standard and tuned yourself. Switchable home tuning.
4
A JFA dealer
833+ in 24 countries
Our files, written by a garage near you. Find a dealer. Own a garage? Become one.
Fixed price quote
Tell us the car and what you want from it
Registration and a line about the car. We come back with what it makes, what it will make and a fixed price, usually the same day.
Questions
Car remapping questions
What is car remapping?
Remapping rewrites the software in the engine control unit (ECU) that decides how much fuel, boost and ignition timing the engine gets. The manufacturer sets those conservatively for every market and every driver; a remap recalibrates them for your car, within what the engine was built to take. Nothing is bolted on and the original file is kept.
How much does car remapping cost?
A Stage 1 remap is priced per car in our calculator: put your registration in and the price for your exact engine is on screen. Stage 2 with the full parts list is from £2,650, less anything already fitted. Stage 3 is quoted per build.
How much power will a remap add?
Typically 15 to 30 percent on a turbocharged petrol and often more on a diesel, because there is more torque to release. On the cars in the table above, Stage 1 alone adds between 44 and 100 bhp. Naturally aspirated engines gain less, usually 5 to 10 percent.
Is remapping safe for my engine?
On a well-maintained engine, yes. A Stage 1 map stays inside the margins the manufacturer built in, which is why it needs no parts. We do not remap an engine with a known fault or an overdue service, and we say so first.
Does remapping affect insurance or warranty?
It can. A manufacturer warranty may not cover a fault it decides is tuning-related, and insurers expect to be told about any modification. Both are your call; we are straight about them.
Can a remap be removed?
Yes. We keep your original file and it can be written back at any time, for a sale or a warranty visit.
How long does it take?
A Stage 1 is usually done in the visit, often within a couple of hours. Stage 2 is normally two visits: parts fitted, then mapped and measured on the dyno.
Remapping near me: do I have to come to Kent?
Not always. We are in Maidstone, we run a mobile remapping service across Kent and the South East, we can post a home tuning tool for some cars, and we have 833+ JFA dealers in 24 countries who write our files.
What is the difference between remapping and chip tuning?
The same thing. Chip tuning is the older name from when the file lived on a chip that was physically swapped. Today the file is written through the diagnostic socket, so it is called remapping or ECU tuning. A tuning box is different again: a plug-in module that tricks the sensors rather than rewriting the map.
Petrol, diesel, hybrid: can they all be remapped?
Petrol turbo and diesel gain the most. Plug-in hybrids such as the BMW 330e can be remapped on the petrol side. Naturally aspirated petrols gain least. Put the registration in and the calculator tells you what your engine makes now and what it will make.
Next
Related
Abarth tuning
The three stages worked through on one car, with our own figures.
Abarth →AdBlue and DPF faults
Repair first, the legal position, and a fault code checker.
AdBlue →Performance exhausts
The Stage 2 parts, fitted and mapped in one place.
Exhausts →Case studies
118 real cars, before and after, on our dyno.
Read them →
Meet the team
The team behind every job
Technicians, calibrators and the front desk, all in Maidstone. No call centre and no subcontracting - the person who books you in is the person you can ask about the job.
Newsletter
Offers on parts and tuning, first
A short email now and then: new vehicle support, parts deals, open days. Nothing daily.