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Car Fault Index

Driver assistance · No confirmed fix yet

Jaecoo 7 radar and driver-assist warnings

Owners of the Jaecoo 7 and its sister cars report the front radar throwing an error and switching off adaptive cruise at motorway speeds, icing over in frost, or blind-spot warnings misbehaving. Ice clears on its own, but for the high-speed cut-outs there is no confirmed dealer fix: one J7 had a missing seal behind the bumper, and a software update did not stop it on an Omoda C5.

Affected versions
1.6 TGDI petrol, SHS hybrids (SHS-P, SHS-H) · 7-speed dual-clutch, hybrid DHT · 2025, 2026
Owner reports
14 owners: Omoda C5 9, Jaecoo J7 (Russia) 5
Typical mileage
20,000 km median (about 12,400 miles); range 5,000 km–23,000 km, from 3 reports that gave a mileage
Most common fix
Ice cleared from the front radar (one owner used warm water) (1 of 14 reports)
Covered by a recall?
No UK recall found
Last updated
November 2026
00–515–20220–40040–70070+Mileage when the fault appeared (thousand km)
Owner reports by mileage, Jaecoo 7 radar and driver-assist warnings. Only reports that state a mileage are counted (3).

What owners report

  • A Jaecoo J7 owner at 5,000 km found adaptive cruise dropping out above 110 km/h on the motorway with an error that later cleared itself. A seal behind the bumper turned out to be missing and was ordered under warranty. [5]
  • Another J7 owner's adaptive cruise radar switched itself off above 130 km/h. [4]
  • On a third J7 the radar dropped out during the winter and later started working again by itself. [3]
  • A J7 owner reports that the blind-spot sensor does not work. [13]
  • An Omoda C5 owner gets a radar error above 130 km/h that turns cruise control off. The dealer updated the software at the first service, but the error kept returning. [9]

Evidence comes from: Omoda C5 (9), Jaecoo J7 (Russia) (5). Jaecoo J7 owners, all petrol, supply a large share of these reports and drive the same car (T1EJ) as UK buyers; the Omoda C5 radar sits in a different bumper. Driver-assist hardware is not part of the powertrain, so the evidence is relevant to petrol and SHS versions.

The icing reports come from Russian winters, with frost and slush freezing over the front bumper. UK winters bring this less often, but snow or slush packed over the front sensor can have the same effect.

Known causes

  • Ice and slush over the front radar in frost switch off adaptive cruise and automatic braking until the sensor clears. [1],[2],[3],[12]
  • On one J7 a seal behind the front bumper had been left out, so the sensor's position shifted in the airflow at speed. [5]
  • No confirmed cause yet for the other high-speed cut-outs; a software update did not cure one. [4],[9]

How dealers have fixed it

What was doneReportsOutcome reported
Ice cleared from the front radar (one owner used warm water)1 of 14Fixed
Missing bumper seal on order under warranty; still to be fitted when the owner posted1 of 14Not stated
Dealer software update at the first service; radar error came back1 of 14Not fixed
Dealer adjustment cured cruise control misbehaving above 100 km/h1 of 14Fixed
Radar unit replaced; outcome not stated1 of 14Not stated

Reports that did not say what was done are left out of this table, so the rows need not add up to 14.

What to ask your dealer

  • “Is a radar or driver-assist fault code stored, and does the log show the speed at which it was set?”
  • “Is the front radar seated correctly, with every seal and bracket behind the bumper fitted?”
  • “Does the radar need recalibrating, for example after bumper work, and is that covered?”
  • “Is there a newer driver-assist software version for my car?”

Is it safe to keep driving?

When the radar drops out the car warns you and switches off adaptive cruise and, in some reports, automatic emergency braking, so you are driving without those aids. Keep your own following distance, do not rely on the assists until the car has been checked, and report it to the dealer. Do not try to re-aim or recalibrate the radar yourself.

Questions

Do UK testers report driver-assist problems on the Jaecoo 7?
Yes, but of a different kind. Autocar's 1.6 petrol long-term car had lane-departure and collision-prevention systems stepping in when not needed, and did not remember the lane setting. Top Gear's SHS gave driver-monitoring warnings while the touchscreen was in use. These are calibration complaints rather than the radar cut-outs reported here.
Why does adaptive cruise switch off at high speed?
Two J7 owners report it above 110 and 130 km/h, and two Omoda C5 owners above 100 and 130 km/h. On one J7 a missing seal behind the bumper let the sensor move in the airflow; on an Omoda C5 a software update did not stop it. No general cause has been confirmed.

Related faults

All 24 known Jaecoo 7 faults, ranked by owner reports

Sources

Facts are restated in our own words; nothing is translated word for word. Follow the links for the originals.

  1. Owner review, Omoda C5, 2023, 1.6T DCT, 23,000 km (drom.ru, in Russian)
  2. Owner review, Omoda C5, 2023, 1.5T CVT (drom.ru, in Russian)
  3. Owner review, Jaecoo J7, 2023, 1.6T DCT (drom.ru, in Russian)
  4. Owner review, Jaecoo J7, 2023, 1.6T DCT (drom.ru, in Russian)
  5. Owner review, Jaecoo J7, 2024, 1.6T DCT, 5,000 km (drom.ru, in Russian)
  6. Short owner review, Omoda C5, 2023 (drom.ru, in Russian)
  7. Short owner review, Omoda C5, 2023, 1.5T CVT (drom.ru, in Russian)
  8. Short owner review, Omoda C5, 2023, 1.5T CVT (drom.ru, in Russian)
  9. Short owner review, Omoda C5, 2023, 1.6T (drom.ru, in Russian)
  10. Short owner review, Omoda C5, 2022, 1.5T CVT, 20,000 km (drom.ru, in Russian)
  11. Short owner review, Omoda C5, 2023, 1.6T (drom.ru, in Russian)
  12. Short owner review, Omoda C5, 2023, 1.6T (drom.ru, in Russian)
  13. Short owner review, Jaecoo J7, 2024 (drom.ru, in Russian)
  14. Short owner review, Jaecoo J7, 2024 (drom.ru, in Russian)
  15. Autocar long-term test: Jaecoo 7 1.6T AWD at 6000 miles (driver-assist interventions) (autocar.co.uk, in English)
  16. Top Gear long-term test: Jaecoo 7 SHS, report 6 (driver-monitoring warnings) (topgear.com, in English)

Last updated 12 November 2026. Spotted a mistake? Tell us; we correct errors within 72 hours.