Quick answer: CSI is the Customer Satisfaction Index, the score a manufacturer gives a dealership based on surveys sent to customers after a sale or a service visit. Each brand runs its own survey, scores it on its own scale and compares every dealer with the regional and national average. The score feeds bonus payments, allocation and franchise reviews, which is why dealers watch it as closely as gross profit.
You will see it written as CSI, CSI score, automotive CSI or customer satisfaction index. Sales and service are scored separately: sales CSI covers the purchase and handover, service CSI covers the workshop visit from booking to collection. In many dealer groups the service score carries more weight, because a customer visits the workshop several times for every car they buy.
What does a CSI score measure?
The survey goes out to the customer within days of the visit, by email, SMS or through the manufacturer app. It asks a fixed set of questions about the parts of the visit the brand cares about, and the customer answers on a scale, most often 1 to 10 or 1 to 5. Typical service questions cover:
- Booking: how easy it was to get an appointment and whether the chosen date was honoured.
- Reception: how quickly the customer was greeted and whether the service advisor confirmed what would be done.
- Communication during the visit: whether the customer was updated, and whether recommended work was explained before it was priced.
- The work itself: fixed right the first time, ready when promised.
- Collection and invoice: no surprises on the bill, the car returned clean, the work explained at handback.
- Likelihood to recommend: the single question most brands weight the heaviest.
Sales surveys follow the same pattern: the salesperson, the test drive, the paperwork, the delivery and the follow-up call.
How is the CSI score calculated?
Every brand does the arithmetic slightly differently, but three mechanics show up almost everywhere.
- Top box scoring. Many programmes only count the highest answer. A 9 out of 10 can score the same as a 6, because anything below the top box is treated as "not completely satisfied". This is why advisors ask customers for "a ten".
- Averaging over a rolling window. The published score is usually a three or six month rolling average, so one bad week keeps hurting for a quarter.
- Benchmarking against the network. The raw score matters less than where it sits against the brand's regional average. Bonus thresholds are often set at "at or above the national average", which means a dealer can improve and still lose money if the network improves faster.
Response rates are low, often well under a fifth of visits, so a handful of surveys can move a small site's score by several points. That is the mathematical reason CSI feels so volatile to a service manager.
Why the automotive CSI score matters commercially
CSI is one of the few numbers a manufacturer can use to reward or punish a dealer outside of sales volume. Depending on the brand and market, the score can affect:
- Variable margin and bonus payments, sometimes worth a meaningful share of a site's annual profit.
- Vehicle allocation, with high scoring dealers getting first call on constrained stock.
- Franchise standards reviews, where a sustained low score triggers an improvement plan.
- Warranty labour rate and parts programmes in some networks.
Inside the dealership the same score is used to rank advisors and salespeople, and it often sits in their pay plan. That is the source of most survey gaming: coaching customers to score a ten, or steering unhappy customers away from the survey. Manufacturers audit for both, and a dealer caught doing it can lose the bonus outright.
What actually moves the score
The J.D. Power 2026 U.S. Customer Service Index Study, which surveyed 51,228 owners, points at communication rather than workmanship as the main lever. Nearly two thirds of customers said they want photo or video evidence with their inspection results, but only 26 percent of mass market and 44 percent of premium customers receive it. Where the evidence is provided while the car is still in the workshop, satisfaction with the service advisor is the highest the study records (J.D. Power).
That matches what service managers see on their own surveys. The low scores cluster around three moments:
- The recommended work call. A customer who hears a price over the phone for a part they never saw feels sold to. A customer who watched the technician point at the worn pad feels informed. Same finding, very different survey answer.
- The wait for an update. Silence between drop-off and the phone call is where "communication" scores are lost.
- The invoice. Any line the customer did not expect, even a small one, drags the collection questions down.
Fix those three and the score moves. Cleaner waiting rooms and free coffee help, but they are not where the points are.
How to improve a CSI score in the service department
- Confirm the job at reception. Repeat what will be done and when the car will be ready, then stick to it. Most "ready when promised" failures are promises that were never realistic.
- Send the evidence, not just the price. A 60 second video of the findings from the ramp, sent with the quote, turns the approval call into a decision the customer feels they made. VentaVid customers do this from the technician's phone; the wider workflow is in the guide to the vehicle health check and in running a video MPI.
- Update before the customer asks. One proactive message at the midpoint of the visit is worth more than a fast answer to a chasing call.
- Walk the invoice at handback. Line by line, against what was approved. Declined items go on the file as declined work for next time, not on today's bill.
- Close the loop on low scores. Call every detractor within 48 hours. The manufacturer often allows a survey to be re-scored after a resolved complaint, and the customer usually returns.
Track the score per advisor alongside hours per repair order and approval rate. An advisor with a high CSI and low approvals is under-selling; one with high approvals and a low CSI is over-selling. The two numbers together tell you who needs coaching on what.
A worked example
A two site group runs a service CSI of 88 percent top box against a brand average of 91. The manufacturer bonus threshold is the average, so the group is missing the payment. The service manager pulls the verbatims: two thirds of the low scores mention "work I did not ask for" or "nobody called me". The fix is not the workshop. Advisors start sending a video of every red and amber finding before quoting, and one update message goes out at midday for every car. Over the next rolling quarter the score has to climb three points, which on a small survey sample means winning back roughly one detractor a week per site.
CSI versus other satisfaction measures
CSI is the manufacturer's score. It is not the same as a Net Promoter Score, which is a single recommend question on a 0 to 10 scale used by the dealer itself, or online reviews, which are public and self-selected. A dealer can have strong Google reviews and a weak CSI, because the survey sample and the questions are different. Only the CSI affects manufacturer payments.
Frequently asked questions
What is a good CSI score for a car dealership?
There is no universal number because every brand uses its own scale and method. The practical benchmark is the brand's regional or national average, since bonus thresholds are usually set there. A dealer at or above the network average is doing well; the gap to the top quartile shows how much bonus is still on the table.
Who sends the CSI survey?
The manufacturer or its research partner, not the dealership. Contact details come from the sales or repair order in the dealer management system, which is why a wrong email address on the RO means a lost survey.
Can a dealer see which customer gave a low score?
In most programmes, yes, unless the customer opted for anonymity. The survey portal shows the verbatim comment and the score, which is what makes follow-up calls to detractors possible.
Is CSI the same for sales and service?
No. They are separate surveys with separate questions and separate scores, and the bonus rules can differ. A dealership can qualify on sales and miss on service in the same quarter.
How fast can a CSI score change?
Because scores are rolling averages over three to six months, improvements take a quarter to show fully. On the way down it feels faster, since a few very low surveys land immediately in a small sample.