# Mack Granite Used Price & Common Problems | Big Rig Risk

> Used Mack Granite buying guide: documented failure risks and market prices.

**Verdict:** insufficient-data

Documented failure points and real market prices for the Mack Granite, sourced and dated.

**Observed used price:** $95,000–$144,900

**Documented failure risks:**
- EGR cooler: Internal EGR cooler cracking/tube erosion is very common on MP7/MP8 engines in a wide high-mileage band, with meaningful repair cost.
- injector cups: Copper injector cups sealing the injectors to the head start leaking fuel into coolant between 300,000-600,000 miles.
- camshaft: Pressed cam lobes can spin on the hollow shaft on higher-mileage MP8 units, with a costly repair.
- aftertreatment / 5 MPH derate: MP8 SCR efficiency faults can escalate to a hard 5 MPH derate.

## Sources
- [carcodefinder.com (failure evidence)](https://carcodefinder.com/diesel/codes/volvo-mack-mp8-egr-cooler-coolant-leak/) (accessed 2026-09-05)
- [cherishyourcar.com (failure evidence)](https://www.cherishyourcar.com/mack-mp8-engine-problems/) (accessed 2026-09-05)
- [soarr.com dealer inventory (7 listings observed 2026-09-05)](https://www.soarr.com/for-sale/trucks/0/Mack/Granite/all-for-sale) (accessed 2026-09-05)
- [NHTSA recall 23V600000 (EXTERIOR LIGHTING:TURN SIGNAL)](https://www.nhtsa.gov/recalls?nhtsacampaignnumber=23V600000) — "Mack Trucks, Inc. (Mack) is recalling certain 2015-2023 GU and GR vehicles.  The turn signals may be positioned incorrectly, reducing their visibility.  As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."" (accessed 2026-09-11)
- [NHTSA recall 11V292000 (ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES)](https://www.nhtsa.gov/recalls?nhtsacampaignnumber=11V292000) — "MACK TRUCKS IS RECALLING CERTAIN MODEL YEAR 2008-2011 GU HEAVY TRUCKS MANUFACTURED FROM SEPTEMBER 12, 2007, THROUGH APRIL 8, 2011, WITH A FOUR BATTERY CABLE DESIGN.  AS A RESULT OF THE ROUTING AND CLIPPING USED, THE BATTERY CABLES MAY COME INTO CONTACT WITH FRAME HARDWARE, WHICH, AS A RESULT OF CHAFING, MAY CAUSE THE INSULATION TO BECOME WORN TO A POINT WHERE A SHORT OCCURS." (accessed 2026-09-11)

_Last verified 2026-09-11. Source: Big Rig Risk — https://bigrigrisk.com/trucks/mack-granite-mack-mp8/ — every claim checked against a primary source before publication (see /methodology/)._